She is ______ newcomer to ______ chemistry but she has already made some importantdiscoveries.

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• 1—I'm sorry to keep you waiting.—Oh, not at all. I ______ here only a few minutes.

  A.have been

  B.had been

  C.was

  D.will be

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• 2She set out soon after dark ______ home an hour later.

  A.arriving

  B.to arrive

  C.having arrived

  D.and arrived

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• 3—Hi, haven't seen you for ages! You look fine!— ______ . You look well, too.

  A.Great

  B.Thanks

  C.Oh, no

  D.Not at all

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• 4I told Sally how to get here, but perhaps I ______ for her.

  A.had to write it out

  B.must have written it out

  C.should have written it out

  D.ought to write it out

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• 5—Can I join your club, Dad、—You can when you ______ a bit older.

  A.get

  B.will get

  C.are getting

  D.will have got

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• 6—I must apologize for ______ ahead of time.—That's all right.

  A.letting you not know

  B.not letting you know

  C.letting you know not

  D.letting not you know

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• 7Rather than ______ on a crowded bus, he always prefers　a bicycle.

  A.ride; ride

  B.riding; ride

  C.ride; to ride

  D.to ride; riding

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• 8—Shall I tell John about it、—No, you ______ . I've told him already.

  A.needn't

  B.wouldn't

  C.mustn't

  D.shouldn't

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• 9—How long has this bookshop been in business、— ______ 1982.

  A.After

  B.In

  C.From

  D.Since

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• 10The missing boys were last seen ______ near the river.

  A.playing

  B.to be playing

  C.play

  D.to play

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