摘要： He knows to deal with men, but when he meets women, he doesn’t know to do. A. how; how B. what; what C. how; what D. what; how

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He knows _ to deal with men, but when he meets women, he doesn’t know to do.

He knows very well ________ to deal with men, but when he meets women, he doesn't know ________ to do.

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He knows _______ to deal with men, but when he meets women, he doesn’t know ______ to do.