China has been working very hard to stop the endangered animals ______ .

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• 1Emergency line operators(接线员) must always _____ calm and make sure that they can get all the information they need to send help.

  A.grow

  B.remain

  C.appear

  D.look

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• 2Whatever he explained, he couldn't ____ the policeman that he was innocent．

  A.confirm

  B.present

  C.convince

  D.admit

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• 3She was so _____ in her job that she didn't hear anybody knocking at the door.

  A.devoted

  B.attracted

  C.drawn

  D.absorbed

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• 4This picture was taken when my father was a child and even I myself couldn't _____.

  A.find him out

  B.pick him out

  C.put him out

  D.take him out

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• 5--- Any suggestions? --- You'd better ___________ the last sentence as it is rather misleading.

  A.put out

  B.leave out

  C.point out

  D.pick out

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• 6While ____ in tea with that dealer, Mr. Smith had himself ____.

  A.trading; ripped off

  B.buying; ripping off

  C.selling; ripped off

  D.purchasing; rip off

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• 7Writing has _____ much of my spare time, but it has given me a great deal of pleasure.

  A.taken off

  B.taken down

  C.taken away

  D.taken up

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• 8Our professor told us that salt water _____ at a lower temperature than fresh water.

  A.is freezing

  B.was frozen

  C.freezes

  D.froze

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