题目内容
_______ the windows are shut before you leave the lab.
- A.Be sure of
- B.Be sure about
- C.Make sure that
- D.Make sure to
C
解析:
本题空后接的是一个从句,A、B两项后接名词;
D项后接动词不定式。
解析:
本题空后接的是一个从句,A、B两项后接名词;
D项后接动词不定式。
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