问题
选择题
The windows must _________ before you leave the room.
A．be closed
B．are closed
C．close
D．be close
答案
答案：A
考察时态。句意：在你离开房间之前，不许关上窗户。结合语境可知本句主语为动作对象，故用被动语态。选A。
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The windows must _________ before you leave the room.
A．be closed
B．are closed
C．close
D．be close
答案：A
考察时态。句意：在你离开房间之前，不许关上窗户。结合语境可知本句主语为动作对象，故用被动语态。选A。