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33. Before he stole the bike, he looked around to make sure      he was alone.

   A. if           B. whether         C. that        D. unless

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32. Nobody except doctors or nurses and some experts      to enter the patient's room.

A. is allowed        B. are allowed       C. allow       D. allows

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31. Please      a picture of your baby to the letter when you write next time.

A. connect         B. bring          C. load        D. attach

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30. We've been told the first two services are free of charge,      the third costs $55.

A. while          B. however        C. then            D. instead

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29.      the washing-up after supper, Bill, and you'll get a big bar of chocolate.

A. Doing         B. Do          C. Having done      D. After doing

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28. He used to complain that money was always      before he knew it.

A. giving out        B. sending out        C. carrying out      D. running out

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27. I read the monthly journal NATURE very often      I can learn more about our earth.

A. which         B. at which        C. where       D. when

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26. May I ask you a      ? Could you help me with this maths problem?

A. solution         B. favor          C. suggestion       D. request

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25. Isn't it lovely to think that I      myself on the sunny beach tomorrow at this time?

A. will enjoy                          B. am enjoying

C. would enjoy                        D. will be enjoying

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24.--How about your weekend?

  --Very boring. We could do nothing but      for the sky to clear up.

A. wait          B. waiting         C. to wait               D. to be waiting

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