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(   ) 7. UNICEF was        in 1946. It works to help children live a  better life.

   A. set up   B. put up

   C.  picked up   D. turned up

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Chinese government should strongly fight against air pollution. They should think of more proper ways to deal with the problem. People should be encouraged to take buses,ride bicycles or walk,instead of driving cars. The factories that pollute heavily should be closed.

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