题目内容
Walmart, which is one of the largest American supermarket chains, some of its stores open 24 hours on Mondays through Saturdays.
A.keeps B.keep C.have kept D.had kept
A
【解析】考查插入语和句子主语的判断。which is one of the largest American supermarket chains是插入语。句子的主语是Walmart,故谓语动词要用单数形式。而句中的"is"可知,此处应用一般现在时。句意:沃尔玛是美国最大的连锁超市之一,部分店从星期一到星期六24小时营业。故选A。
考点:考查插入语和句子主语的判断
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