作业帮Tom didn't know where his CD hidden by his mother.这一句若把by his mother去掉,应该怎样改?
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Tom didn't know where his CD hidden by his mother.这一句若把by his mother去掉,应该怎样改?
Tom didn't know where his CD hidden by his mother.这一句若把by his mother去掉,应该怎样改?
Tom didn't know where his CD hidden by his mother.这一句若把by his mother去掉,应该怎样改?
Tom didn't know where his CD was hidden .