问题补充：
Mary,along with her parents Hainan for a week and they will come back soon.
A. have been to
B. has been in
C. have been in
D. has been to
答案：
A. have been to
(答案→)B. has been in
C. have been in
D. has been to
解析：
试题分析: 句意：玛同房，和她的父母一起去海南一周了，他们很快就要回来了。have been to去过某地，已经回来；have been in已经去某地，还在某地；根据they will come back soon.他们很快就要回来了，主语为Mary，故选B.
