With the help of high technology, more and more new substances ____________ in the past years.

试卷相关题目

• 1The baby is generally healthy, but every now and then he ____________ a cold.

  A.has caught

  B.is catching

  C.will catch

  D.does catch

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• 2--- Why? Tom, your shirt is so dirty! --- Mum, I ____________ my storeroom downstairs.

  A.cleaned

  B.have cleaned

  C.was cleaning

  D.have been cleaning

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• 3When he was alive, the old scientist used to say that knowledge ____________ from practice and he gained his experience by doing a lot of practical work.

  A.was coming

  B.had come

  C.comes

  D.would come

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• 4Would you give him my best regards as soon as he _______?

  A.came

  B.come

  C.has come

  D.comes

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• 5Lucy will have learned English for 8 years by the time she _______ form the university next year.

  A.will graduate

  B.will have graduate

  C.graduates

  D.is to graduate

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• 6You don't need to describe her, I ______ her serveral times.

  A.had met

  B.have met

  C.met

  D.meet

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• 7Judy is going to marry the sailor she _______ in Rome last year.

  A.meets

  B.met

  C.has met

  D.would meet

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• 8Ladies and gentlemen, please fasten your seat belts. The plane  ______________.

  A.takes off

  B.is taking off

  C.has taken off

  D.took off

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• 9I can guess you were in a hurry. You ______your sweater inside out .

  A.had worn

  B.are wearing

  C.were having on

  D.were dressing

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• 10The workers ______ busily when the boss came to look for something she ______ in the office.

  A.had worked; had left

  B.were working; had left

  C.working; had left

  D.had worked; left

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