Not only his parents but also his grandfather to a lot of places of interest in our count

问题补充：

Not only his parents but also his grandfather to a lot of places of interest in our country since they came here.

A. has gone

B. has been

C. have gone

D. have been

答案：

A. has gone

(答案→)B. has been

C. have gone

D. have been

解析：自从他们来到这儿，不仅他的父母还有他的爷爷已经去了我们国家很多有趣的地方。not only …but also连接两个主语时，谓语动词就近原则，同时have been to 表示去过某地，现在已经回来了，have gone to 表示过了某地，现在还没有回来，故选B