1. Usually we dont realize how important nature is to us______ it is too late.

　　A. unless B. until C. if D. after

　　2．Go to bed early，______ you wont get up on time next morning.

　　A．then B．and C．but D．or

　　3．Tony is a clever boy，______ he usually fails in Chinese exams.

　　A．so B．but C．or D. because

　　4. Could you please give me your e-mail address ____ you go?

　　A. as soon as B. before C. after D. until

　　5. Dont get off the bus ____ it has stopped .

　　A. until B. if C. to D. for

　　6. He met many problems ____ he was going over his lessons .

　　A. before B. as soon as C. since D. while

　　7. We have been good friends ____ we joined the same ping-pong team.

　　A. after B. before C. since D. until

　　8. My brother is going to look for another job______the company offers him more money．

　　A. after B.when C unless D．besides

　　9. I didnt know he came back ____ I met him in the street.

　　A. since B. when C. until D. after

　　10. -Look! Here comes our school bus.

　　-No hurry. Dont get on it ______it has stopped.

　　A. until B. after C. since D. when

　　11. When someone is ill, he ____ she should try to smile at life.

　　A. and B. but C. or D. so

　　12. Come ____ see my family.

　　A. and B. or C. but D.until

　　13. - How long have you known the doctor ?

　　- ____ he helped me three years ago.

　　A. When B. Before C. Because D. Since

　　14. Study hard, ____ youll fall behind the others.

　　A. and B. but C. or D. though

　　15．-Be careful， ____ you will make mistakes in your exams．

　　-I know that，Mum．One can never be too careful．

　　A．and B．or C．nor D．but

　　16．I arrived at the airport____ the plane had taken off．

　　A.after B．while C．when D．beflore

　　17.Uncle Wang gave all his savings to the Hope School____ he himself was not rich.

　　A.because B.as if C.though D.or

　　18. The dress fits me well,____ I dont want to buy it because its too expensive.

　　A. so B. and C. or D. but

　　19. English is interesting, _____ I didnt like it at first.

　　A. and B. so C. but D. or

　　20. -Would you like to come to dinner tonight?

　　-I will ________ Im not too busy.

　　A. and B. if C. so D. but

答案请点击下一页

　　答案：

　　1-5 BDBBA

　　6-10 DCCCA

　　11-15 CADCB

　　16-20 DCBCB

　　1. Usually we dont realize how important nature is to us______ it is too late.

　　A. unless B. until C. if D. after

　　2．Go to bed early，______ you wont get up on time next morning.

　　A．then B．and C．but D．or

　　3．Tony is a clever boy，______ he usually fails in Chinese exams.

　　A．so B．but C．or D. because

　　4. Could you please give me your e-mail address ____ you go?

　　A. as soon as B. before C. after D. until

　　5. Dont get off the bus ____ it has stopped .

　　A. until B. if C. to D. for

　　6. He met many problems ____ he was going over his lessons .

　　A. before B. as soon as C. since D. while

　　7. We have been good friends ____ we joined the same ping-pong team.

　　A. after B. before C. since D. until

　　8. My brother is going to look for another job______the company offers him more money．

　　A. after B.when C unless D．besides

　　9. I didnt know he came back ____ I met him in the street.

　　A. since B. when C. until D. after

　　10. -Look! Here comes our school bus.

　　-No hurry. Dont get on it ______it has stopped.

　　A. until B. after C. since D. when

　　11. When someone is ill, he ____ she should try to smile at life.

　　A. and B. but C. or D. so

　　12. Come ____ see my family.

　　A. and B. or C. but D.until

　　13. - How long have you known the doctor ?

　　- ____ he helped me three years ago.

　　A. When B. Before C. Because D. Since

　　14. Study hard, ____ youll fall behind the others.

　　A. and B. but C. or D. though

　　15．-Be careful， ____ you will make mistakes in your exams．

　　-I know that，Mum．One can never be too careful．

　　A．and B．or C．nor D．but

　　16．I arrived at the airport____ the plane had taken off．

　　A.after B．while C．when D．beflore

　　17.Uncle Wang gave all his savings to the Hope School____ he himself was not rich.

　　A.because B.as if C.though D.or

　　18. The dress fits me well,____ I dont want to buy it because its too expensive.

　　A. so B. and C. or D. but

　　19. English is interesting, _____ I didnt like it at first.

　　A. and B. so C. but D. or

　　20. -Would you like to come to dinner tonight?

　　-I will ________ Im not too busy.

　　A. and B. if C. so D. but

答案请点击下一页

　　答案：

　　1-5 BDBBA

　　6-10 DCCCA

　　11-15 CADCB

　　16-20 DCBCB