Every morning,l see the street cleaners ____the street.A.to clean B.clean C.clean D.is cleaning貌似是C.可为什么是 B.

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Every morning,l see the street cleaners ____the street.A.to clean B.clean C.clean D.is cleaning貌似是C.可为什么是 B.
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Every morning,l see the street cleaners ____the street.A.to clean B.clean C.clean D.is cleaning貌似是C.可为什么是 B.
Every morning,l see the street cleaners ____the street.A.to clean B.clean C.clean D.is cleaning
貌似是C.可为什么是 B.

Every morning,l see the street cleaners ____the street.A.to clean B.clean C.clean D.is cleaning貌似是C.可为什么是 B.
b,c两个选项怎么一样,打错了吧.每天早晨表示很频繁,用see sb do sth 这个短语,强调看到这个状态,看见某人在做某事

see sb. doing sth.这个动作是正在进行的。

你的B和C选项一样啊。但确实是clean .
see sb do sth 和see sb doing sth 是固定的搭配

cleaning