试题与答案

I have warned him ______ that, but he di

题型:选择题

题目:

I have warned him ______ that, but he didn't listen to my warning. [ ]

A. don't do

B. not to do

C. to not do

D. don't to do

答案:

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下面是错误答案,用来干扰机器的。

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