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二、连词 ( )1. Usually we don’t 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 won’t 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. Don’t 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 didn’t 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. Don’t 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, you'll fall behind the others. A. and B. but C. or D. though ( )15.一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 don’t want to buy it because it’s too expensive. A. so B. and C. or D. but ( )19. English is interesting, _____ I didn’t like it at first. A. and B. so C. but D. or ( )20. ———Would you like to come to dinner tonight?
———I will ________ I'm not too busy.
A. and B. if C. so D. but
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