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

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• 1Although 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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• 2The 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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• 3He 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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• 4A 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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• 5— Why do you look so worried? —My computer broke down and my essay ______ unfinished since.

  A.had left

  B.has been left

  C.has left

  D.was left

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• 6My mind wasn't on what he was saying so I'm afraid I ______ half of it.

  A.was missing

  B.had missed

  C.will miss

  D.missed

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• 7— This is Tom speaking. — Oh, it's great. But I ______ your voice just now.

  A.didn't know

  B.didn't recognize

  C.didn't hear

  D.don't know

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• 8When I came into the teacher's office, he ________ on the phone.

  A.was speaking

  B.spoke

  C.had been speaking

  D.had spoken

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• 9---Alice, why aren't you at work today? ---I ________a day off.

  A.have given

  B.had been given 　　　

  C.gave

  D.was given

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• 10— How long have you been in this office? — Just a few minutes．My cousins _______ here together with me．

  A.have walked

  B.had walked

  C.walked

  D.have been walking

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