（2010四川省成都市35. 1）I wont be able to understand what you say,_______you speak too quickly.

　　A.if B.though C.because

　　（2010浙江省湖州市，22，1）-Is everyone here today?

　　--No.Tom is at home_____he has got a bad cold.

　　A.because B.if C.until D.unless

　　（2010山西省，27，1）In summer , food goes bad easily ________ it is put in the refrigerator.

　　A. until B. if C. unless

　　（2010河南省，25，1）( ) its difficult to make her dream come true，she never gives up

　　A Though B Unless C Because D If

　　（2010山东省莱芜市，27，1）--I hear Jack Chan will come to Laiwu next week.

　　--Really? _______ he comes, my younger sister will be very happy,

　　A．If B．Until C．Unless D．Before

　　（2010贵州省铜仁市，35，1）- May I go to the concert with you?

　　- Im afraid not ____ you have a ticket, because I have only one.

　　A. since B. if C. unless D. though

　　（2010山东省菏泽市，27，1）Mary spends a lot of money on clothes _______ her family is not rich.

　　A. because B. though C. if D. so

答案：CACAACB