The windows must _________ before you leave the room.
A．be closed B．a(chǎn)re closedC．close D．be close
A
考察時態(tài)。句意：在你離開房間之前，不許關上窗戶。結合語境可知本句主語為動作對象，故用被動語態(tài)。選A。
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