21. Betty didn't go to see the film yesterday ___ she was ill.

　　A. because B. but C. until D. if

　　22. May I sit nearer___I can see more clearly?

　　A. as if B. so that C. even if D. so

　　23. ___ you work hard, you will certainly succeed.

　　A. Though B. If C. Because D. For

　　24.___ he came to study in the university, he has made much progress in the study of English.

　　A. While B. When C. Since D. After

　　25. I'd like to go swimming _____ the water is not too cold.

　　A. for B. unless C. if D. whether

　　26. There are ___ many league members in class 2 ___ in Class 4.

　　A. both; and B. 'so; that C. either; or D. as; as

　　27. -Do you have a big library? -No, we don't. At least, not___yours.

　　A. as big as B. as big than C. as bigger than D. bigger as

　　28. Suzhou is not ____ beautiful ____ Hangzhou.

　　A. as; than B. so; as C. even; than D. /; than

　　29. Iron is more useful ___ any other metal.

　　A. as B. than C. then D. so

　　30. I want to know ___ she is going to see a film.

　　A. if B. that C. what D. which

　　31. You are sure to pass the exam ___ you study hard.

　　A. if B. though C. that D. since

　　32. I'll go to see the film with you___I have time this evening.

　　A. whether B. so C. if D. when

　　33. ___ you study harder, you'll never pass the final exam.

　　A. If B. Until C. Unless D. Except

　　34. Although it was raining, o o still worked in the fields.

　　A. but they B. and they C. they D. and yet they

　　35. ___ there were only five soldiers left at the front, ___ they went on fighting.

　　A. Because; so B. If; and C. Though; but D. Though; /

　　36.___ she is very old, ___ she can still work eight hours a day.

　　A. Because; so B. Though; but C. As; yet D. Though; yet

　　37. Please answer the question in a loud enough voice ___ all the class may hear.

　　A. so, that B. or C. in order that D. and

　　38. Lift it up___I may see it.

　　A. though B. so that C. as D. than

　　39. I hurried___I wouldn't be late for class.

　　A. so B. so that C. if D. unless

　　40 We should go by bus ___ we can get there earlier.

　　A. as soon as B. where C. in order that D. as

　　參考答案：

　　1-5 B D B A D 6-10 A C D B D 11-15 B C B A C

　　16-20 B B D B C 21-25 A B B C C 26-30 D A B B A

　　31-35 A C C C D 36-40 D C B B C