25. Where have you been ____ you left home? A. before B. as C. since D. when
26.____ the problem of method is solved, talking about the task is useless.
A. Until B. Since C. After D. Unless
27. We have produced 15% more cotton this year____ we did last year.
A. as B. than C. like D. white
28.It is late; ____, Im too tired to go out. A. besides B. except C. except for D. except that
29. Everything around us is ____ solid ..liquid ____ gas.
A. not .. .but... B. either.. .or... C. neither.. .nor... D. whether.. .or...
30. He will come ____ you ask him. A. whether B. unless C. if D. while
31.____ he will come or not is still unknown. A. If B. Where C. That D. Whether
32.I don t know ____ to stay at home or go out. A. whether B. if C. how D. where
33. He spoke loudly ____ the audience could hear him clearly.
A. so B. that C. so that D. in order to
34. The book is not easy.____ its rather difficult.
A. On the one hand B. On the contrary
C. On the other hand D. On the other contrary
35. You must work hard,____ you will not learn English well.
A. if B. whether C. otherwise D. unless
36. It rained heavily,____ the basketball match had to be put off.
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