Only in recent years ______ to realize the importance of wildlife conservation.

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• 1Never_______Lisa would arrive but she turned up at the last minute.

  A.did we think

  B.have we thought

  C.we thought

  D.we have thought

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• 2Only when the meeting was over ______ go back to meet his friend.

  A.he could　

  B.he was able to　

  C.was he able to

  D.was able to he

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• 3In a chemical change, energy cannot be created ,_______.

  A.nor can it be destroyed

  B.not it be destroyed

  C.so can't it not be destroyed

  D.either it cannot be destoryed

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• 4Many scientists believe that global warming , if ______ , will cause extreme climate changes this century .

  A.not stopping

  B.no stop

  C.not stopped

  D.without stop

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• 5_______, I'd have told you.

  A.If I would have known

  B.If I had have known

  C.Had I known

  D.Should I know

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• 6Not only_______know the theory, but also_______learn how to apply it in practice.

  A.should we; should we

  B.we should; we should

  C.should we; we should

  D.we should; should we

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• 7He spoke ______ quickly ______ I couldn't understand a word he was saying.

  A.such; that

  B.so; that

  C.too; to

  D.quite; that

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• 8Bill wasn't happy about the delay of the report by Jason, and _______.             

  A.I was neither

  B.I was either

  C.either was I

  D.neither was I

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• 9The minute I opened the window, _______.

  A.in a sparrow flew

  B.flew in a sparrow

  C.did a sparrow fly in

  D.in flew a sparrow

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• 10Nothing seems to please her, _________?

  A.does it

  B.doesn't it

  C.is it

  D.isn't it

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