Question

【题目】The river is very deep and I’ve warned Jack ________ in it.

A.not to swimB.to not swimC.swim not to

Answer 1

【答案】A

【解析】

句意：这条河很深，我已经警告过Jack不要在里面游泳。

考查动词不定式的否定形式。根据语境可知，此处应为“警告Jack不要在河里游泳”，warn sb not to do sth警告某人不要做某事。故选A。