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I don't know how to use the machine.
1,I don’t know how to use the telephone.2,How do you use the
I don't know how to use a dictionary.同义句I don’t know — I — —
I don't know ( ).A.what to do it B.how to do it C.what to do
7.I don’t know _________.A.what to do it B.how to do it C.wh
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