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【题目】He often does at school.Look!He is doing morning over there.

A. exercise;exercise B. exercise;exercises

C. exercises;exercises D. exercises;exercise

【答案】B

【解析】

句意:他经常在学校做运动,看,他在那边做早操呢。exercise 泛指“锻炼”时,是不可数名词;表示“体操”或“练习题”时,是可数名词,故选B。

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