Havingatripabroadiscertainlygoodfortheoldcouple,butitr...
来源：语文精选馆 1.33W
问题详情：
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
【回答】
B
知识点：非谓语动词
题型：选择题
