Air pollution has become than before. We must do something to stop it. A.serious B.more serious C.mo...
2022-06-25 09:43:19 143次 山东省青岛市2019-2020学年八年级上学期10月月考英语试卷 单选题 反馈错误 加入收藏 正确率 : 100%
题目内容：
Air pollution has become than before. We must do something to stop it.
A.serious B.more serious
C.most serious D.the most serious
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