问题补充：
Both the parents and James London. They will come back soon.
A. has been to
B. have been to
C. has gone to
D. have gone to
答案：
A. has been to
B. have been to
C. has gone to
(答案→)D. have gone to
解析：通过Both the parents and James可知，主语是复数，应该用have，故排除AC；have been to 表示“去过”已经回来了，have gone to表示“去了”还没回来，根据They will come back soon.可知，应该用have gone to。所以本题选D。
