______has been done to stop pollution caused by traffic.A、LotB、MuchC、FewD、Non

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问题 ______has been done to stop pollution caused by traffic.

选项 A、Lot
B、Much
C、Few
D、None

答案 B

解析为防止交通给环境带来污染，我们已经采取了很多措施。much在这里用作代名词作句子主语。

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