David helps his mother with the housework every Saturday for about.A. one and half hoursB

David helps his mother with the housework every Saturday for abou t.
A. one and half hours
B. a half and an hour
C. an hour and half
D. one and a half hours

A. one and half hoursB. a half and an hourC. an hour and half(答案→)D. one and a half hours解析：一个半小时应表达为:an hour and a half或one and a half hours。

我明天再问问老师，叫他解释下这个问题

这下我知道了

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