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33. He spoke loudly ____ the audience could hear him clearly.

A. so           B. that          C. so that       D. in order to

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32.I don' t know ____ to stay at home or go out.   A. whether   B. if    C. how   D. where

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31.____ he will come or not is still unknown.   A. If   B. Where   C. That   D. Whether

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30. He will come ____ you ask him.      A. whether    B. unless   C. if   D. while

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29. Everything around us is ____ solid ..liquid ____ gas.

A. not .. .but...           B. either.. .or...       C. neither.. .nor...     D. whether.. .or...

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28.It is late; ____, I'm too tired to go out.   A. besides  B. except  C. except for  D. except that

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27. We have produced 15% more cotton this year____ we did last year.

A. as           B. than         C. like        D. white

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26.____ the problem of method is solved, talking about the task is useless.

A. Until            B. Since            C. After            D. Unless

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25. Where have you been ____ you left home?      A. before   B. as   C. since   D. when

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24.____ you told me, I had heard nothing of what happened.  A. Till  B. Until  C. After  D. Since

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