Better all the lights are turned off before you leave the classroom．A. to be sureB. to ma

发布时间：2020-08-16 11:41:35

Better      all the lights are turned off before you leave the classroom．
A. to be sure
B. to make sure
C. be sure
D. make sure

网友回答

A. to be sure
B. to make sure
C. be sure
(答案→)D. make sure
解析：Better = Had better, 后接动词原形。
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