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：玛丽，和她的父母一起去海南一周，不久就要回来了。have been to已经去某处回来了，have been in已经在某处。根据 they will come back soon.他们不久就要回来了，可知还在海南，并且在那里一周了，along with her parents做状语，主语为Mary,故选B
