Although there is no life on Mars now, some experts think that there ________ some form of life a long time ago.

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• 1---The government should try to balance economic growth and pollution from industry. ---______. It's time to do it.

  A.All right

  B.Exactly

  C.Go ahead

  D.That's OK

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• 2---We need a person badly to be in charge of this design. ---______the new comer have a try?

  A.May

  B.Will

  C.Shall

  D.Need

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• 3— My sons are not a little restless． — Oh? Boys _______ be boys．

  A.should

  B.can

  C.may

  D.will

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• 4—The traffic is heavy now, so Mike _____ come late. —Let's wait ten more minutes.

  A.can

  B.need

  C.may

  D.shall

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• 5—Could you please have my car ready today? —Sure, the damage is not that serious, so it _____be ready by 5: 00 pm.

  A.should

  B.could

  C.might

  D.need

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• 6You _________to the meeting yesterday. What was the reason for your absence?

  A.had come

  B.came

  C.would have come

  D.should have come

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• 7—Happy birthday! — Thank you! It's the best present I_________ for.

  A.should have wished

  B.could have wished

  C.may have wished

  D.must have wished

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• 8--- I can't find my purse anywhere . --- You ________ have lost it while shopping .

  A.may

  B.can

  C.should

  D.would

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• 9If you often go to a gallery, it ______ well change forever the way you look at art

  A.may

  B.should

  C.will

  D.must

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• 10The boy _____ be very naughty, but he is very lovely.

  A.might

  B.can

  C.may

  D.need

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