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30. All these gifts must be mailed immediately_________ in time for Christmas.

  A. in order to have received          B. in order to receive

C. so as to be received            D. so as to be receiving

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29.------Excuse me, sir, where is Room 301?

----- Just a minute, I’ll have Bob_______ you to your room.

A. show                B. shows              C. to show             D. showing

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