题目内容
【题目】Walking to school is ______ good exercise.
A.the B.an C. × D.a
【答案】C
【解析】
试题分析:句意:走着去学校是很好的锻炼。exercise意味“锻炼”是不可数名词,因此不用冠词修饰。故选C。
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