Everyone including her parents the Wolf Hill and they will be back this afternoon.A.

问题补充：

Everyone, including her parents, the Wolf Hill, and they will be back this afternoon.

A. has gone to

B. have gone to

C. has been to

D. have been to

答案：

(答案→)A. has gone to

B. have gone to

C. has been to

D. have been to

解析：此题重点考查have been to 和have gone to的区别，前者曾经去过，后者表示去了某地，根据句意“今天下午回来”说明他们去了，故选A。