______hours do you exercise every week ?  Nine hours.
A．How manyB．How oftenC．How muchD．How long
A

試題分析：你每周做幾個(gè)小時(shí)的運(yùn)動(dòng)？九小時(shí)。A多少，后接可數(shù)名詞復(fù)數(shù)，例如本題中的hours;B多久一次，表頻率，C多少，后接不可數(shù)名詞，D多長(zhǎng)。結(jié)合題意，故選A。
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