it takes my father half an hour to clean his car.(对划线部分提问)(划线部分是 half an hour)

问题描述:

it takes my father half an hour to clean his car.(对划线部分提问)(划线部分是 half an hour)

How long does it take your father to clean his car?
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How long does your father clean his car?

应该是
How long does it take your father to clean his car?
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