It is important to have your eyes examined regularly to check for any sign of eye disease that may not have any ________.

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• 1 Carbon dioxide, which makes a________between us and the sun, prevents heat from getting out of the atmosphere easily, so the earth is becoming warmer.

  A.difference

  B.comparison

  C.connection

  D.barrier

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• 2Walking alone in the dark，the boy whistled to ________ his courage.

  A.hold up

  B.keep up

  C.set up

  D.take up

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• 3—You look upset.What's the matter? —I had my proposal ________ again. 

  A.turned over

  B.turned on

  C.turned off

  D.turned down

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• 4 It was a real race________time to get the project done.Luckily，we made it.

  A.over

  B.by

  C.for

  D.against

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• 5 The bell rang and every student had to ________ their examination papers.

  A.give up

  B.give away

  C.give out

  D.give in

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• 6Recently，these companies have ________ some workers because of the drop in economy.

  A.hired

  B.dismissed

  C.refused

  D.employed

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• 7 The prize will go to the writer ________ story shows the most imagination.

  A.that

  B.which

  C.whose

  D.what

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• 8 According to the law, all foreigners have to________with the local police within two weeks of arrival.

  A.associate

  B.dispute

  C.negotiate

  D.register

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• 9It's going to rain.Xiao Feng，will you please help me ________ the clothes on the line?

  A.get off

  B.get back

  C.get in

  D.get on

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• 10You ________ park here！It's an emergency exit.

  A.wouldn't

  B.needn't

  C.couldn't

  D.mustn't

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