— Why do you look so worried? —My computer broke down and my essay ______ unfinished since.

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• 1---You are late again! We _________you could attend the assembly on time. ---Sorry, I __________to my office to get my papers.

  A.think, went

  B.thought, have gone

  C.think, were going

  D.thought, went

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• 2—Does your sister work as a teacher in Canada? —No, but she once  _________there for five years．

  A.taught

  B.had taught

  C.has taught

  D.would teach

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• 3More than a dozen students in that school _______ abroad to study medicine last year.

  A.sent

  B.were sent

  C.had sent

  D.had been sent

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• 4Is honesty the best policy? We __________that it is when we are little.

  A.will teach

  B.teach

  C.are taught

  D.will be taught

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• 5Don't call me at 9:00 o'clock tomorrow morning ,when I _______ a lecture at Harvard.

  A.give

  B.am giving

  C.will be giving

  D.am going to give

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• 6A new cinema _________here . They hope to finish it next month.

  A.will be built

  B.is built

  C.has been built

  D.is being built

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• 7He asked me how much ________ on the mountain bike.

  A.did I pay

  B.I had spent

  C.did I spend

  D.I had cost

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• 8The new dictionaries are very useful. They _______ well and _______ already.

  A.sell; have been sold out

  B.sold; had sold out

  C.sell; sell out

  D.are sold; have been sold out

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• 9Although medical science________ control over several dangerous diseases, what worries us is that some of them are returning.

  A.achieved

  B.has achieved

  C.will achieve

  D.had achieved

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• 10All the scientific evidence ______ that increasing use of carbon dioxide ______ the rise of the earth's temperature.

  A.show; result in

  B.shows; result from

  C.shows; results in

  D.shows; results from

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