______is estimated that a round-trip to Mars would take more than a year.

试卷相关题目

• 1—I don't think you can manage it. —That __________!

  A.will all depend on

  B.will all depend

  C.all depends

  D.all depends on

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• 2--- I'd like to go home now. --- Why not stay here for the night? It is so late now. ____, it is raining so hard

  A.Besides

  B.Therefore

  C.Instead

  D.As a result

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• 3Don't come and see me today - I'd rather you ______ tomorrow.

  A.to come

  B.come

  C.came

  D.coming

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• 4We're very annoyed ________ his mistake, because we have emphasized this for several times

  A.with

  B.at

  C.on

  D.to

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• 5— It is very cold these days. — ______

  A.So is it

  B.So it is

  C.It so is

  D.Is it so

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• 6______ you said at the meeting describes a bright future for the company.

  A.When

  B.How

  C.What

  D.That

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• 7— Tom is never late for work. Why is he absent today ? — Something _______ to him .

  A.must happen

  B.should have happened

  C.could have happened

  D.must have happened

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• 8----It is _____impossible . ----You mean it's out of the question ,do you ?

  A.very

  B.quite

  C.fairly

  D.rather

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• 9---How can I use this washing machine? ---Well, just ______ the instructions.

  A.belong to

  B.refer to

  C.agree to

  D.point to

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• 10—Have you been teaching here since graduation? —No, I _____ on a farm for five years．

  A.had worked

  B.have worked

  C.was working

  D.worked

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