问题
选择题
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
答案：B
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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：B