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-Does my question sound ______ enough? - I don't think so. You can ask more ______ by using “could” ...
题目内容：
-Does my question sound ______ enough?
- I don't think so. You can ask more ______ by using “could” instead of “can”.
A.polite; politely B.politely; polite C.politely; politely D.polite; polite
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