Therearesomedangerousfishesinthis

发布时间:2020-07-26 00:56:09

There are some dangerous fishes in this river, and I've warned Jack ________ here.A.not to swimB.to not swimC.swim not toD.to swim not

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A解析warn警告,后接不定式做宾语,即warn sb. to do sth.,若宾语是否定的。在to前面加not。
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