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(2017·山东德州· 32)In some countries，people ________ download(下载) music from the Internet without paying...
题目内容：
(2017·山东德州· 32)In some countries，people ________ download(下载) music from the Internet without paying，because it's against the law.
A.wouldn't B.needn't C.mustn't D.couldn't
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