In the past twelve months the research members ______ the effectiveness of many materials in a home building.

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• 1—Liu Xuan, did you see the Denmark's famed “Little Mermaid” sculpture in Shanghai Expo? —No, I didn't. I _______ it twice in Denmark.

  A.have seen

  B.were seeing

  C.had seen

  D.saw

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• 2---- How long ____ at this job? ---- Since 1990.

  A.were you employed

  B.have you been employed

  C.had you been employed

  D.will you be employed

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• 3Ann ______ here any more．She left last month.

  A.won't work

  B.doesn't work

  C.hasn't worked

  D.isn't working

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• 4Since mid July, many areas in Shaanxi ______ continuous heavy rain, leading to frequent natural disasters.

  A.saw

  B.had seen

  C.has seen

  D.have seen

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• 5. ---- How long _______ at this job? ---- Since 1990.

  A.were you employed

  B.have you been employed

  C.had you been employed

  D.will you be employed

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• 6—You didn't go to the party last night, did you? —I do wish I _______ there, but I had to do my homework.

  A.was

  B.had been

  C.went

  D.have been

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• 7I have to draw some money from the bank before our money ______.

  A.runs out of

  B.is run out

  C.runs out

  D.runs up

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• 8Great changes_____ in the small city in the last 20 years.

  A.have taken place

  B.took place

  C.had taken place

  D.are happening

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• 9I've tried my best and done quite well, but he ______ faults with me.

  A.always finds

  B.has always found

  C.always found

  D.is always finding

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• 10Since then the number of people taking driving lessons ________ 20％.

  A.has increased to

  B.increases by

  C.has increased by

  D.have increased by

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