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Don't make any ________. It may wake up your little sister. She is sleeping in the bedroom.
A.changes
B.homework
C.discoveries
D.noise
参考答案:D
解析:
点拨:后面的句子提到:它可能吵醒你的妹妹,她正在卧室睡觉。可知前句应是:不要发出噪音。故选D。
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