Scientistsalotofexperimentsona

Scientists _______ a lot of experiments on animals, hoping to find and effective way to cure the patients who had AIDS.

A．carried on

B．carried out

C．carried away

D．carried off

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A．recognize

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C．understand

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A．got through; suffer from	B．looked through; suffering
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-----It was ________ you spoke about her behind her back.

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A．connected

B．known

C．updated

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_________ New Year’s Day around the corner, all the salesmen were trying hard to talk customers_________ buying their goods.

A．On, for

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