—The air pollution is terrible.— It will be worse we take action to protect the environment.

题型：单选题题类：常考题难易度：普通

江苏洪泽外国语中学2016届九年级上册英语期中考试试卷

—The air pollution is terrible.

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

A、if B、unless C、so D、though

举一反三

—Because their parents are _____ busy _____ they have little time to stay with their children.

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