Earth is believed ______ by an object the size of Mars at some point in the distant past before it’s surface cooled.

试卷相关题目

• 1The teacher doesn't permit ________ in class.

  A.smoke

  B.to smoke

  C.smoking

  D.to have a smoke

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• 2I am considering ________ him tomorrow because he is considered ________ great contributions to science cause.

  A.to visit；to make　

  B.visiting; making

  C.to visit; having made　

  D.visiting; to have made

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• 3 Mrs. Brown was much disappointed to see the washing machine she had had _______ went wrong again.

  A.it

  B.it repaired

  C.repaired

  D.to be repaired

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• 4________ the difficult maths problem, I have consulted Professor Russell several times.

  A.Working out

  B.Worked out

  C.To work out

  D.Work out

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• 5—Can those _________ at the back of the classroom hear me? ---No problem.

  A.seat

  B.sit

  C.seated

  D.sat

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• 6So many problems ________， he is having a difficult time.

  A.settled

  B.to settle

  C.settling

  D.are to settle

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• 7________ by the policy, he decided to build a new factory.

  A.Being encouraged

  B.Encouraging

  C.Encouraged

  D.Having encouraged

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• 8Last summer, I went back to my hometown,_________the neighbors and the houses that I used to be familiar with were gone．

  A.only finding

  B.only to find

  C.to find

  D.found

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• 9If _________ in, viruses can result in illness or even death.

  A.breathe

  B.breathing

  C.breathed

  D.to breathe

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• 10With a lot of things _________ ， John will have a difficult time.

  A.to deal with

  B.deal with

  C.dealing with

  D.dealt with

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