[题目]---The air pollution is terrible.---It will be worse we take action to protect the environment.A. if B. unlessC. until D. When 题目和参考答案——青夏教育精英家教网—

题目内容

【题目】---The air pollution is terrible.

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

A. if B. unless

C. until D. When

【答案】B

【解析】

试题分析：句意为：---空气污染太可怕了。---如果我们不采取措施保护环境，将会更加糟糕。if：如果， unless：除非、如果不，until ：直到……才……，When：当……时候。根据语境可知应选B。

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