it took me_____to finish my math homework yesyerday.A.two hours of a half B.two and a half hours能说一下为什么吗

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it took me_____to finish my math homework yesyerday.A.two hours of a half B.two and a half hours能说一下为什么吗
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it took me_____to finish my math homework yesyerday.A.two hours of a half B.two and a half hours能说一下为什么吗
it took me_____to finish my math homework yesyerday.A.two hours of a half B.two and a half hours
能说一下为什么吗

it took me_____to finish my math homework yesyerday.A.two hours of a half B.two and a half hours能说一下为什么吗
选择B.
two and a half hours 意思是:两个半小时
= two hours and a half
所以A不对.

B 两个半小时 two and a half hours = two hours and a half