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the windows are shut before you leave the lab.A.Be sure ofB.Be sure aboutC.Make sure thatD.Make sure

编辑:chaxungu时间:2026-04-24 12:49:31分类:高中英语题库

_______ the windows are shut before you leave the lab.
A.Be sure ofB.Be sure aboutC.Make sure thatD.Make sure to在线课程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。