中文谷Havingatripabroadiscertainlygoodfortheoldcouple,butitr...
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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
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