Davidhelpshismotherwiththehousewor

发布时间：2020-07-27 10:10:17

David helps his mother with the housework every Saturday for about______.A.one and half hoursB.a half and an hourC.an hour and halfD.one and a half hours

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D解析一个半小时应表达为:an hour and a half或one and a half hours。
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