They must have been enjoying themselves there，or they _____ so long.

试卷相关题目

• 1No two people can be half an hour together _____ one shall gain an evident superiority over the other.

  A.but

  B.when

  C.if

  D.because

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• 2By the time you arrive home，I _____ for several hours，so please don't make a noise when you come in.

  A.shall be sleeping

  B.shall have slept

  C.shall sleep

  D.shall have been sleeping

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• 3Just as no two words are truly synonoyms， _____ no two different expressions，or ways of expressions，can mean exactly the same thing.

  A.so

  B.as

  C.that

  D.therefore

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• 4One should never lose one's heart when _____ with temporary difficulties.

  A.being confronted

  B.confronted

  C.having been confronted

  D.confronting

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• 5Rather than _____ everything to the last minute，he always prefers to start early.

  A.leave

  B.to leave

  C.leaving

  D.leaves

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