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(2010四川省成都市35. 1)I won’t 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)( ) it's 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?

- I’m 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