Question

【题目】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

Answer 1

【答案】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。