单选题：Smoke particles and other air pollutants are often trapped i

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题目内容：
Smoke particles and other air pollutants are often trapped in the atmosphere, thus forming smog. A．caught
B．burned
C．dirtied
D．covered

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The ambassador was given the book as a token of the governme

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Men are more easily infected with AIDS than women.

Men are more easily infected with AIDS than women.A．Right B．Wrong C．Not mentione

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Academic records cannot be duplicated.

Academic records cannot be duplicated.A．borrowed B．purchased C．rewritten D．copie

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Anyone with a medical degree can set up a medical practice i

Anyone with a medical degree can set up a medical practice in the USA．Right B．Wr

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Physicians in the US are poorly rewarded for their workA．Right B．Wrong C．Not men

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