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30. The research is so designed that once ______ nothing can be done to change it.

    A. begins           B. having begun           C. beginning           D. begun

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29. --What’s the terrible noise?

--The man next to the door ______ his new house.

A. decorating       B. has been decorating     C. is decorating     D. decorates

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28. These books were so interesting that they ______ in no time.

    A. sold         B. had been sold           C. were sold           D. would sold

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27. The school life he was used to ______ a lot since five years ago.

    A. changes         B. changing        C. has changed        D. change

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26. It was in the deep forest ______ the villagers hunted the endangered animal.

    A. that              B. where           C. which              D. what

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25. Nokie, one of the mobile brands that ______ accepted by the customers these years, is suffering a great pressure in the market of China.

    A. have been          B. has been     C. was             D. were

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24. Only in this way ______ whether an animal has been trained.

    A. can you realize             B. you can realize

C. realize you can             D. can realize you

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23. I hate ______ that someone calls when I’m sleeping.

    A. /               B. one         C. this             D. it

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22. ______ should be responsible for the unexpected result.

    A. Who do you think           B. Do you think whom

C. Who you think              D. Whom do you think

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21. Tom, ______ honest man, has made ______ good doctor over these year.

    A. a, the               B. an, a            C. the, a              D. an, the

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