—The air pollution in Longgang is getting more and more serious. —I'll say. How to keep the air fresh is a big ______

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1. (2019·温州模拟) —The air pollution in Longgang is getting more and more serious.
—I'll say. How to keep the air fresh is a big ________ for us.

A . influence B . decision C . problem D . experience

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使用过本题的试卷

浙江省温州市2018-2019学年九年级下学期英语期中教学诊断性测试试卷