【題目】---The air pollution is terrible.

--- It will be worse we take action to protect the environment.

A. if B. unless C. so D. though

【答案】B

【解析】

試題分析:句意:--空氣污染是糟糕的。--除非我們采取行動(dòng)保護(hù)環(huán)境否則會(huì)更糟糕。A. if如果;B. unless 除非,如果不;C. so 所以;D. though 盡管。根據(jù)句意,故選B。

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