The Greatest Mystery Of Whales

　　The whale is a warm-blooded，air-breathing animal，giving birth to its young alive，sucking them--and，like all mammals，originated on land.There are many front flippers，used for steering and stability, are traces of feet.

　　__________ . of this.Its Immense strength is __________ . into the great body of the big whales，and in fact most of a whales body is one gigantic muscle.The blue whales pulling strength has been estimated __________ . 400 horsepower.One specimen was reported to have toweda whaling vessel for seven hours at the __________. of eight knot .

　　An angry whale will __________ . A famous example of this was the fate of Whaler Essex, __________ . was sunk off the coast of South America early in the last century.More recently, steel ships have __________ . their plates buckledin the same way.Sperm whaleswere known to seize the old-time whaleboats in their jaws and crush Them.

　　The greatest __________ . of whales is their diving ability.The sperm whale dives to the Bottom for his __________ . food，the octopus.In that search he is known to go as far Down as 3,200 feet, where the. __________ . is 1,400 pounds，to a square inch.Doing so he

　　Will __________ . underwater long as one hour.Two special skills are involved in this storing up enough __________. and tolerating the great change in pressure.Just how he does it scientists have not __________ . .It is believed that some of the oxygen is stored in a special __________ . of blood vessels，rather than just held in the lungs.And it is believed that a special kind of oil in his head is some sort of compensating mechanism that __________ . adjusts the internal pressure of his body.But since you cant bring a live whale into the laboratory for study, no one knows just how these things work.

　　51 A aspects

　　B signs

　　C ways

　　D reasons

　　52 A worked

　　B divided

　　C built

　　D moved

　　53 A at

　　B in

　　C of

　　D with

　　54A number

　　B degree

　　C distance

　　D rate

　　55A abandon

　　B attack

　　C leave

　　D board

　　56A as

　　B who

　　C which

　　D that

　　57A had

　　B operated

　　C Seen

　　D caught

　　58A interest

　　B job

　　C danger

　　D mystery

　　59A favorite

　　B fast

　　C new

　　D sufficient

　　60A depth

　　B pressure

　　C level

　　D size

　　61A set

　　B become

　　C remain

　　D rest

　　62A heat

　　B energy

　　C food

　　D oxygen

　　63A witnessed

　　B determined

　　C applied

　　D calculated

　　64A system

　　B place

　　C arrangement

　　D equipment

　　65A mentally

　　B artificially

　　C manually

　　D automatically

　　答案

　　51.答案为B。第一段讲到鲸鱼很像陆地上的哺乳动物，最后一句举了一些例子来说明这一点。sign的意思是符号，特征，鲸鱼具有陆地上哺乳动物的一些特征，故选B。

　　52.答案为c。something is built into的意思是把装入，这里指鲸鱼生有巨大的气力。其他几个选项意思上讲不通。

　　53.答案为A。只能用介词at，不能用其他介词。

　　54.答案为D。rate表示速度，从上下文来讲，选D意思才讲得通。

　　55.答案为B。此题亦必须根据上下文的意思来推测选哪个词。鲸鱼被惹怒后会攻击船只，所以选B。

　　56.答案为C。这里是一非限定性定语从句，关系代词作 主语，用which，故选C。

　　57.答案为A。have + something+过去分词是一固定结构，此处只能选A。

　　58.答案为D。本题所在句子为该段主题句，谈的是鲸鱼的潜水能力。鲸鱼的潜水能力很强，能下潜到很深的地方，科学家们不解，所以说是个迷，故选D。

　　59.答案为A。虽然本题的几个选项都能与food搭配，但从上下文意思来讲，只有A正确。

　　60.答案为B?？崭窈竺娴拿适莗ound，重量单位，据此可以判断选B，因为其他几个选项不能和pound搭配。

　　61.答案为C。呆在水下要用动词remain，其他几个动词放入空格处意思讲不通。

　　62.答案为D。此题也必须在读懂上下文意思的基础上才能作出判断，这里指鲸鱼聚集氧气，故选D。

　　63.答案为B。上文谈到鲸鱼为什么能够在水下承受巨大的压力，科学家们还没有找到答案。选项中的deterrmine的意思是确定，此词放入空格处意思讲得通，其他几个选项讲不通，故选B。

　　64.答案为A。special虽然和几个选项都能搭配使用，但只有选项A意思上讲得通，故A为正确答案。

　　65.答案为D。此题亦需根据上下文的意思作出判断。automatically的意思是自动地。

　 The Greatest Mystery Of Whales

　　The whale is a warm-blooded，air-breathing animal，giving birth to its young alive，sucking them--and，like all mammals，originated on land.There are many front flippers，used for steering and stability, are traces of feet.

　　__________ . of this.Its Immense strength is __________ . into the great body of the big whales，and in fact most of a whales body is one gigantic muscle.The blue whales pulling strength has been estimated __________ . 400 horsepower.One specimen was reported to have toweda whaling vessel for seven hours at the __________. of eight knot .

　　An angry whale will __________ . A famous example of this was the fate of Whaler Essex, __________ . was sunk off the coast of South America early in the last century.More recently, steel ships have __________ . their plates buckledin the same way.Sperm whaleswere known to seize the old-time whaleboats in their jaws and crush Them.

　　The greatest __________ . of whales is their diving ability.The sperm whale dives to the Bottom for his __________ . food，the octopus.In that search he is known to go as far Down as 3,200 feet, where the. __________ . is 1,400 pounds，to a square inch.Doing so he

　　Will __________ . underwater long as one hour.Two special skills are involved in this storing up enough __________. and tolerating the great change in pressure.Just how he does it scientists have not __________ . .It is believed that some of the oxygen is stored in a special __________ . of blood vessels，rather than just held in the lungs.And it is believed that a special kind of oil in his head is some sort of compensating mechanism that __________ . adjusts the internal pressure of his body.But since you cant bring a live whale into the laboratory for study, no one knows just how these things work.

　　51 A aspects

　　B signs

　　C ways

　　D reasons

　　52 A worked

　　B divided

　　C built

　　D moved

　　53 A at

　　B in

　　C of

　　D with

　　54A number

　　B degree

　　C distance

　　D rate

　　55A abandon

　　B attack

　　C leave

　　D board

　　56A as

　　B who

　　C which

　　D that

　　57A had

　　B operated

　　C Seen

　　D caught

　　58A interest

　　B job

　　C danger

　　D mystery

　　59A favorite

　　B fast

　　C new

　　D sufficient

　　60A depth

　　B pressure

　　C level

　　D size

　　61A set

　　B become

　　C remain

　　D rest

　　62A heat

　　B energy

　　C food

　　D oxygen

　　63A witnessed

　　B determined

　　C applied

　　D calculated

　　64A system

　　B place

　　C arrangement

　　D equipment

　　65A mentally

　　B artificially

　　C manually

　　D automatically

　　答案

　　51.答案为B。第一段讲到鲸鱼很像陆地上的哺乳动物，最后一句举了一些例子来说明这一点。sign的意思是符号，特征，鲸鱼具有陆地上哺乳动物的一些特征，故选B。

　　52.答案为c。something is built into的意思是把装入，这里指鲸鱼生有巨大的气力。其他几个选项意思上讲不通。

　　53.答案为A。只能用介词at，不能用其他介词。

　　54.答案为D。rate表示速度，从上下文来讲，选D意思才讲得通。

　　55.答案为B。此题亦必须根据上下文的意思来推测选哪个词。鲸鱼被惹怒后会攻击船只，所以选B。

　　56.答案为C。这里是一非限定性定语从句，关系代词作 主语，用which，故选C。

　　57.答案为A。have + something+过去分词是一固定结构，此处只能选A。

　　58.答案为D。本题所在句子为该段主题句，谈的是鲸鱼的潜水能力。鲸鱼的潜水能力很强，能下潜到很深的地方，科学家们不解，所以说是个迷，故选D。

　　59.答案为A。虽然本题的几个选项都能与food搭配，但从上下文意思来讲，只有A正确。

　　60.答案为B。空格后面的名词是pound，重量单位，据此可以判断选B，因为其他几个选项不能和pound搭配。

　　61.答案为C。呆在水下要用动词remain，其他几个动词放入空格处意思讲不通。

　　62.答案为D。此题也必须在读懂上下文意思的基础上才能作出判断，这里指鲸鱼聚集氧气，故选D。

　　63.答案为B。上文谈到鲸鱼为什么能够在水下承受巨大的压力，科学家们还没有找到答案。选项中的deterrmine的意思是确定，此词放入空格处意思讲得通，其他几个选项讲不通，故选B。

　　64.答案为A。special虽然和几个选项都能搭配使用，但只有选项A意思上讲得通，故A为正确答案。

　　65.答案为D。此题亦需根据上下文的意思作出判断。automatically的意思是自动地。