The number of people in the world__________ about 6 billion and large quantities of waste ________ each year.

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• 1I feel it is you as well as your wife that _______ for your son's bad performance at school.

  A.are to blame

  B.is going to blame

  C.are to be blamed

  D.is to be blamed

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• 2______ — Hi, Michelle, I can't find my e-dictionary. — Sorry, I _______ it. I guess I put it on the top shelf with my things.

  A.had used

  B.used

  C.was using

  D.am using

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• 3—Bob has gone to Califoni

  A.—Oh, can you tell me when he _______?A.has left

  B.left

  C.is leaving

  D.would leave

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• 4—You were not listening；what troubled you? —I _______ my coming math exam．

  A.am thinking about

  B.was thinking about

  C.had thought about

  D.will think about

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• 5— The food in the restaurant is horrible. If only we ______ to the students' canteen. — But the food isn't everything. Isn't it nice just to get away from all the noise?

  A.would go

  B.have gone

  C.had gone

  D.will go

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• 6--- I haven't finished my essay because the computer broke down when I was downloading the required data last night. --- Really! You could have turned to me. I ______ mine.

  A.didn't use

  B.won't use

  C.hadn't used

  D.wasn't using

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• 7Had the weather been good, the children ____ out for a walk.

  A.had gone

  B.could have gone

  C.would go

  D.went

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• 8A lot of food as well as some tents _________to Yushu since the earthquake occurred.

  A.has been transported

  B.have been transported

  C.is being transported

  D.are transported

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• 9By the time Fred gets back home, his girlfriend _______ for London to study.

  A.will have left

  B.leaves

  C.has left

  D.will leave

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• 10I believe that those mountains ________ with trees in a few years' time. 

  A.are covered

  B.will be covered

  C.are covering

  D.will cover

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