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        1. 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(guān)上窗戶。結(jié)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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