【題目】We usually play sports _______three hours every day.

A. for B. in C. of D. at

【答案】A

【解析】

試題分析:句意我們每天通常做三個小時的運動。for后跟一段時間;in表示泛指在上午、下午或晚上;of……的;at在具體的時間點。空后three hours是一段時間,故選A。

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