【題目】Too many cars on roads cause air pollution and it is for our health.

A、guly B、cruel C、harmful

【答案】C

【解析】

試題分析：句意：在馬路上，太多的車引起空氣污染，對(duì)于我們的健康有害。此題考查動(dòng)詞短語(yǔ)釋義be harmful for對(duì)某物有害，根據(jù)句意，故選C。

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