Unit 10 B卷

　　一、阅读理解

　　A

　　It’s a goal for millions and millions of families every year—keep the Christmas spending within

　　a certain amount，but can still afford the gifts that your loved ones will enjoy.Never has this concern been greater in recent years than right now.Even so，there are several things that you can do to help.

　　Hit the sales.

　　No one wants to get up at four o’clock in the morning and fight

　　to get the best deal on Black Friday，and it’s surely very tough to pick up the courage and get out there in the cold for a good deal，but sometimes—it can be well worth.Many retailers(零售商)offer specials all through the day—and some even offer online Black Friday specials，so you may still be able to get a great deal on Black Friday.

　　Pay close attention to advertisements.

　　Once the Christmas shopping season is coming，retailers hungry for business will do just about whatever to get you in the store.Pay very close attention to weekly advertisements of sales among the major retailers and you may be lucky enough to find different prices for the same thing in different shops.

　　Shop online.

　　Some of us don’t like running from store to store in order to get the best price on the perfect gift，and some of us don’t like to go out in the cold at all—thankfully for us，we can do online shopping.

　　The world of online shopping lets people visit all the major retailers as well as some specialty stores that could only be found on the Internet.Customers can find exactly what they are looking for，at the best possible price without ever having to leave the house.With traditional Christmas shopping consumers

　　are sometimes limited to what’s left in stock if they wait too long to get to a particular store.

　　1．The first paragraph implies that______.

　　A．nowadays not many people can afford expensive gifts

　　B．recently many people don’t want to spend money on gifts

　　C．Christmas is a time to make our loved ones enjoy their gifts

　　D．Christmas is a time to make us feel free to buy our loved ones gifts

　　2．In the writer’s opinion，it is rewarding on Black Friday______.

　　A．if the weather is not very cold

　　B．if we don’t have to fight for the best deals

　　C．if we don’t have to get up early

　　D．if we get what we want at a good price

　　3．The underlined word“specials”means“______”．

　　A．some experts in shopping

　　B．certain things for especially low price

　　C．some kind of help for a certain customer

　　D．things that can only be found on Friday

　　4．We can have more choices______.

　　A．on Black FridayB．in a particular store

　　C．on the Internet

　　D．from retailers

　　B

　　In the rush to get to school，you drop a piece of toast on the floor.Do you throw it away or decide it’s still OK to eat? If you’re like most people，you eat it.Maybe you follow the“5-second rule”，which claims foods are safe to eat if you pick them up within 5 seconds from dropping them.

　　But you might want to think again.Scientists now say that 5 seconds are all it takes for foods to become contaminated(被污染的)with enough bacteria to make you sick.

　　Bacteria are single-celled organisms that can cause many kinds of illnesses.Some kinds of bacteria can grow on food.If we eat foods on which these bacteria are growing，we can become sick.Common symptoms include vomiting(呕吐)and diarrhea(腹泻)．

　　One of these food-borne bacteria is Salmonella(沙门氏菌)．It makes 1.4 million people sick every year.Earlier this year,370 people became sick after eating peanut butter that had

　　been contaminated with Salmonella at the manufacturing plant.Salmonella are often found in raw eggs and chicken.Cooking kills these bacteria，which is why it is so important to cook eggs，chicken，and other foods thoroughly.

　　Being a good housekeeper is a second tip for preventing infection.If household surfaces aren’t washed thoroughly，they can support Salmonella for weeks.

　　But how long does it take these bacteria to attach to food? To answer that question，a team of scientists at Clemson University in South Carolina decided to test the 5-second rule，using sandwich ingredients.First，they placed a known amount of Salmonella cells on three surfaces：wood，tile，and carpet.They placed a slice

　　of bread and a slice of bologna on each surface for 5,30，or 60 seconds.After just 5 seconds，both the bread and bologna picked up enough bacteria to make you sick.

　　So，forget the 5-second rule.If your toast lands on the floor，toss it out.

　　5．What is“a 5-second rule”？

　　A．If you drop food on the ground，you can’t eat it unless you pick it up within five seconds.

　　B．If you drop food on the ground，you can’t eat it unless you pick it up five seconds later.

　　C．If you drop food on the ground，you can eat it even you pick it up five seconds later.

　　D．If you drop food on the ground，you can eat it at any time after you pick it up.

　　6．According to the text，which of the following statements about bacteria is NOT correct?

　　A．They can cause many kinds of illnesses.

　　B．They are single-celled organisms.

　　C．They can grow on the surface of food.

　　D．They only can be found on food.

　　7．How can people avoid the infection of Salmonella?

　　A．Never eat peanut butter.

　　B．Never eat chicken and eggs.

　　C．Never eat food unless they’re cooked.

　　D．Wash hands before dinner.

　　8．Why did the scientists at Clemson University make the experiment?

　　A．Because they wanted to see if Salmonella cells can grow on such kind of food.

　　B．Because they wanted to

　　see whether the 5-second rule is correct or not.

　　C．Because they wanted to find out the best food among the three.

　　D．Because they wanted to see whether bacteria can make one sick or not.

　　二、任务型读写

　　阅读下面短文，根据所读内容在表格中的空白处填入恰当的单词。注意：每个空格只填一个单词。

　　Solar energy，as the name suggests，can be defined as the energy received from the sun.

　　One of the biggest advantages of solar energy is that it is a renewable source of energy.It can be produced as long as the sun lasts，which is for next millions of years.Therefore，solar energy can be truly called a long-lasting source of energy.Solar cells are easy to install and can be installed on rooftops，hence no extra space needed.Solar energy can be produced in any part of the world，at any place where abundant sunlight is available.

　　One of the most important environmental advantages of solar energy is that it is a non-polluting source of energy as there are no emissions of carbon dioxide or other gases during the production of electricity.Owing to the above mentioned reasons，solar energy does not pose any threat to the environment and hence，is also known as a clean source of energy.

　　When thinking of the economic advantages of solar energy，one should note that solar energy production and use is free.There are no charges and bills to tend to !

　　Lastly，one of the other major benefits of solar energy is that this renewable energy is healthy，safe and easier to use at homes，offices or on larger scales.

　　However，the cost of installation of the solar cell is quite high.Solar energy cannot effectively work in cold countries.It is less effective in rainy seasons and cold climates.Also，solar energy can only be produced during the day，and not at night.For large scale applications，larger area and higher investment is necessary，which may not be met easily.

　　We conclude that solar energy is one of the best sources of energy.Although not used in a large scale today，solar energy has the potential to produce more than thousand times of electricity that is currently required in the whole world.Therefore，it is necessary to create awareness about the benefits of solar energy for a better future！

　　Topic Solar energy

　　1.______ As the name suggests，it is the energy from the sun.

　　Advantages *The biggest advantage is

　　that it is renewable and 2.______.

　　*The cells are easy to install and the sunlight is 3.______ in most areas.

　　The 4.______ one is that it is non-polluting and clear.

　　The economic one is that it is 5.______ of charge.

　　Another major advantage is that it is healthy，safe and easier to use.

　　6.______ *The installation cost is high.

　　*It is less effective if there isn’t enough 7.______.

　　*It is 8.______ for large scale applications.

　　9.______ It is one of the best sources of energy and has the 10.______ for a wider use.

　　参考答案与解析

　　课时作业(二十)

　　Unit 10　B卷

　　一、阅读理解

　　解题导语：本文向读者介绍了三种经济的购买圣诞节礼物的方式，它们是商场促销、关注广告和网上购物。

　　1．解析：段落大意题。由第一段中“keep the Christmas spending within a certain amount”可知很多人难以负担昂贵的圣诞节礼物。

　　答案：A

　　3．解析：词义猜测题。由第一段中提到的人们难以负担昂贵的圣诞节礼物及该段中人们在寒冷中早起购物可知该词的意思是“特价商品”。

　　答案：B

　　4．解析：推理判断题。由最后一段中“The world of online shopping lets people visit all the major retailers as well as some specialty stores...”可确定答案。

　　答案：C

　　5．解析：细节理解题。从文章的第一段的最后一句可以归纳出这个定义。

　　答案：A

　　6．解析：细节理解题。通读文章第三段，就可以很容易得出答案，其实它的存在方式和地点不固定。

　　答案：D

　　7．解析：推理判断题。根据文章第四段最后一句话“Cooking kills these bacteria...”我们就可以知道，只有吃煮熟的食品，才可以预防沙门氏菌的感染。

　　答案：C

　　8．解析：细节理解题。根据文章倒数第二段中的“But how long does it take these bacteria to attach to food？To answer that question...”可以得出答案。

　　答案：B

　　Unit 10 B卷

　　一、阅读理解

　　A

　　It’s a goal for millions and millions of families every year—keep the Christmas spending within

　　a certain amount，but can still afford the gifts that your loved ones will enjoy.Never has this concern been greater in recent years than right now.Even so，there are several things that you can do to help.

　　Hit the sales.

　　No one wants to get up at four o’clock in the morning and fight

　　to get the best deal on Black Friday，and it’s surely very tough to pick up the courage and get out there in the cold for a good deal，but sometimes—it can be well worth.Many retailers(零售商)offer specials all through the day—and some even offer online Black Friday specials，so you may still be able to get a great deal on Black Friday.

　　Pay close attention to advertisements.

　　Once the Christmas shopping season is coming，retailers hungry for business will do just about whatever to get you in the store.Pay very close attention to weekly advertisements of sales among the major retailers and you may be lucky enough to find different prices for the same thing in different shops.

　　Shop online.

　　Some of us don’t like running from store to store in order to get the best price on the perfect gift，and some of us don’t like to go out in the cold at all—thankfully for us，we can do online shopping.

　　The world of online shopping lets people visit all the major retailers as well as some specialty stores that could only be found on the Internet.Customers can find exactly what they are looking for，at the best possible price without ever having to leave the house.With traditional Christmas shopping consumers

　　are sometimes limited to what’s left in stock if they wait too long to get to a particular store.

　　1．The first paragraph implies that______.

　　A．nowadays not many people can afford expensive gifts

　　B．recently many people don’t want to spend money on gifts

　　C．Christmas is a time to make our loved ones enjoy their gifts

　　D．Christmas is a time to make us feel free to buy our loved ones gifts

　　2．In the writer’s opinion，it is rewarding on Black Friday______.

　　A．if the weather is not very cold

　　B．if we don’t have to fight for the best deals

　　C．if we don’t have to get up early

　　D．if we get what we want at a good price

　　3．The underlined word“specials”means“______”．

　　A．some experts in shopping

　　B．certain things for especially low price

　　C．some kind of help for a certain customer

　　D．things that can only be found on Friday

　　4．We can have more choices______.

　　A．on Black FridayB．in a particular store

　　C．on the Internet

　　D．from retailers

　　B

　　In the rush to get to school，you drop a piece of toast on the floor.Do you throw it away or decide it’s still OK to eat? If you’re like most people，you eat it.Maybe you follow the“5-second rule”，which claims foods are safe to eat if you pick them up within 5 seconds from dropping them.

　　But you might want to think again.Scientists now say that 5 seconds are all it takes for foods to become contaminated(被污染的)with enough bacteria to make you sick.

　　Bacteria are single-celled organisms that can cause many kinds of illnesses.Some kinds of bacteria can grow on food.If we eat foods on which these bacteria are growing，we can become sick.Common symptoms include vomiting(呕吐)and diarrhea(腹泻)．

　　One of these food-borne bacteria is Salmonella(沙门氏菌)．It makes 1.4 million people sick every year.Earlier this year,370 people became sick after eating peanut butter that had

　　been contaminated with Salmonella at the manufacturing plant.Salmonella are often found in raw eggs and chicken.Cooking kills these bacteria，which is why it is so important to cook eggs，chicken，and other foods thoroughly.

　　Being a good housekeeper is a second tip for preventing infection.If household surfaces aren’t washed thoroughly，they can support Salmonella for weeks.

　　But how long does it take these bacteria to attach to food? To answer that question，a team of scientists at Clemson University in South Carolina decided to test the 5-second rule，using sandwich ingredients.First，they placed a known amount of Salmonella cells on three surfaces：wood，tile，and carpet.They placed a slice

　　of bread and a slice of bologna on each surface for 5,30，or 60 seconds.After just 5 seconds，both the bread and bologna picked up enough bacteria to make you sick.

　　So，forget the 5-second rule.If your toast lands on the floor，toss it out.

　　5．What is“a 5-second rule”？

　　A．If you drop food on the ground，you can’t eat it unless you pick it up within five seconds.

　　B．If you drop food on the ground，you can’t eat it unless you pick it up five seconds later.

　　C．If you drop food on the ground，you can eat it even you pick it up five seconds later.

　　D．If you drop food on the ground，you can eat it at any time after you pick it up.

　　6．According to the text，which of the following statements about bacteria is NOT correct?

　　A．They can cause many kinds of illnesses.

　　B．They are single-celled organisms.

　　C．They can grow on the surface of food.

　　D．They only can be found on food.

　　7．How can people avoid the infection of Salmonella?

　　A．Never eat peanut butter.

　　B．Never eat chicken and eggs.

　　C．Never eat food unless they’re cooked.

　　D．Wash hands before dinner.

　　8．Why did the scientists at Clemson University make the experiment?

　　A．Because they wanted to see if Salmonella cells can grow on such kind of food.

　　B．Because they wanted to

　　see whether the 5-second rule is correct or not.

　　C．Because they wanted to find out the best food among the three.

　　D．Because they wanted to see whether bacteria can make one sick or not.

　　二、任务型读写

　　阅读下面短文，根据所读内容在表格中的空白处填入恰当的单词。注意：每个空格只填一个单词。

　　Solar energy，as the name suggests，can be defined as the energy received from the sun.

　　One of the biggest advantages of solar energy is that it is a renewable source of energy.It can be produced as long as the sun lasts，which is for next millions of years.Therefore，solar energy can be truly called a long-lasting source of energy.Solar cells are easy to install and can be installed on rooftops，hence no extra space needed.Solar energy can be produced in any part of the world，at any place where abundant sunlight is available.

　　One of the most important environmental advantages of solar energy is that it is a non-polluting source of energy as there are no emissions of carbon dioxide or other gases during the production of electricity.Owing to the above mentioned reasons，solar energy does not pose any threat to the environment and hence，is also known as a clean source of energy.

　　When thinking of the economic advantages of solar energy，one should note that solar energy production and use is free.There are no charges and bills to tend to !

　　Lastly，one of the other major benefits of solar energy is that this renewable energy is healthy，safe and easier to use at homes，offices or on larger scales.

　　However，the cost of installation of the solar cell is quite high.Solar energy cannot effectively work in cold countries.It is less effective in rainy seasons and cold climates.Also，solar energy can only be produced during the day，and not at night.For large scale applications，larger area and higher investment is necessary，which may not be met easily.

　　We conclude that solar energy is one of the best sources of energy.Although not used in a large scale today，solar energy has the potential to produce more than thousand times of electricity that is currently required in the whole world.Therefore，it is necessary to create awareness about the benefits of solar energy for a better future！

　　Topic Solar energy

　　1.______ As the name suggests，it is the energy from the sun.

　　Advantages *The biggest advantage is

　　that it is renewable and 2.______.

　　*The cells are easy to install and the sunlight is 3.______ in most areas.

　　The 4.______ one is that it is non-polluting and clear.

　　The economic one is that it is 5.______ of charge.

　　Another major advantage is that it is healthy，safe and easier to use.

　　6.______ *The installation cost is high.

　　*It is less effective if there isn’t enough 7.______.

　　*It is 8.______ for large scale applications.

　　9.______ It is one of the best sources of energy and has the 10.______ for a wider use.

　　参考答案与解析

　　课时作业(二十)

　　Unit 10　B卷

　　一、阅读理解

　　解题导语：本文向读者介绍了三种经济的购买圣诞节礼物的方式，它们是商场促销、关注广告和网上购物。

　　1．解析：段落大意题。由第一段中“keep the Christmas spending within a certain amount”可知很多人难以负担昂贵的圣诞节礼物。

　　答案：A

　　3．解析：词义猜测题。由第一段中提到的人们难以负担昂贵的圣诞节礼物及该段中人们在寒冷中早起购物可知该词的意思是“特价商品”。

　　答案：B

　　4．解析：推理判断题。由最后一段中“The world of online shopping lets people visit all the major retailers as well as some specialty stores...”可确定答案。

　　答案：C

　　5．解析：细节理解题。从文章的第一段的最后一句可以归纳出这个定义。

　　答案：A

　　6．解析：细节理解题。通读文章第三段，就可以很容易得出答案，其实它的存在方式和地点不固定。

　　答案：D

　　7．解析：推理判断题。根据文章第四段最后一句话“Cooking kills these bacteria...”我们就可以知道，只有吃煮熟的食品，才可以预防沙门氏菌的感染。

　　答案：C

　　8．解析：细节理解题。根据文章倒数第二段中的“But how long does it take these bacteria to attach to food？To answer that question...”可以得出答案。

　　答案：B