Not only Jam but also his parents a few interesting places since they came to China.A. wi

问题补充：

Not only Jam but also his parents a few interesting places since they came to China.

A. will visit

B. has visited

C. have visited

D. visited

答案：

A. will visit

B. has visited

(答案→)C. have visited

D. visited

解析：句意：自从他们来到中国以来，詹姆和他的父母参观了几个有趣的地方。结合语境可知本句描述的是现在已经完成的动作，故用现在完成时态。由Not only……but also连接的两个并列主语，谓语动词与后一个主语保持一致。his parents是复数形式，故谓语动词用复数，选C。