Before you leave the lab, the doors and windows ____shut in case of rain. A. is B. are C. is to be D...
2023-02-08 04:28:06 64次 09-10年福建省厦门市高一上学期12月月考 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
Before you leave the lab, the doors and
windows ____shut in case of rain.
A.
is B.
are C.
is to be D.
are to be
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