Having a trip abroad is certainly good for the old couple, but it remains _____ whether they will en...
2023-02-04 03:53:22 44次 20102011河南许昌是高二下学期四校联考试题 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
Having a
trip abroad is certainly good for the old couple, but it remains _____ whether
they will enjoy it.
A. to
see B. to be seen C.
seeing D. seen
本题链接：
