He _____ his potential had it not been for his desire to meet new challenges.

试卷相关题目

• 1 Even if you are an experienced teacher, you sometimes _______ make some mistakes.

  A.can

  B.must

  C.should

  D.Will

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• 2 He _______ another career but, at the time, he didn't have enough money to attend school.

  A.might choose

  B.might have chosen

  C.had to choose

  D.must have chosen

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• 3 I really _____ thank you enough. It's been an amazing day.

  A.needn't

  B.should

  C.must

  D.Cannot

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• 4Some experts demanded that children _______ time to sleep and play.

  A.give

  B.should

  C.would be given

  D.be given

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• 5Persons under 18 ______ not be employed in night work in the United States.

  A.can

  B.may

  C.will

  D.shall

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• 6 –Just now I called home but nobody answered. --Oh, sorry. I ________.

  A.must have fallen asleep

  B.must fall asleep

  C.can't been asleep

  D.must be asleep

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• 7We're still at the airport. If it weren't for the delayed flight, we _______the concert right now.

  A.can be enjoying

  B.must have enjoyed

  C.would be enjoying

  D.should have enjoyed

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• 8—Must I bring my lunch here? —No, you _______ . We have prepared it.

  A.shouldn't

  B.don't have to

  C.mustn't

  D.needn't to

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• 9— Marx looks nervous. — So___________you if you had so fierce a competition.

  A.do

  B.did

  C.will

  D.Would

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• 10—Sorry，Mum, I lost my key to the bicycle again． —Oh! How ______ you be so careless! You have to learn to look after your belongings．

  A.can

  B.may

  C.must

  D.dare

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