There are many computers in the office.Make sure _ the doors before you leave.A you lock.B you will lockC for lockingD of locking
2022-09-27 13次 反馈错误 加入收藏 正确率 : 100%
题目内容：
There are many computers in the office.Make sure _ the doors before you leave.
A you lock.
B you will lock
C for locking
D of locking
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