27. People have become aware ______the fact that carbon dioxide, poison to the e

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27. People have become aware ______the fact that carbon dioxide, poison to the environment, contributes_____ air pollution.

A．of, to

B．/, to

C．of, of

D．of, for

答案

解析

略

举一反三

29. The key ____ English well is to read more when ____.

A．to learn, possible	B．of learning, possibly
C．of learning, was possible	D．to learning, possible

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30. People ran out __________ as fire tore through the building.

A．with vain

B．in rags

C．with one voice

D．with fear

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28 He spoke very slowly, but he still didn’t get his meaning _______.
A across B cross C through D though

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Why not describe what you saw that day___? It will surely help the police to find out who were to blame for the terrible accident.

A．in order

B．in return

C．in detail

D．in charge

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Welcome to the World Expo, which will take place in Shanghai May 1
October 31.

A．during; on

B．from; to

C．between; of

D．on; till

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