Question

【题目】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

Answer 1

【答案】B

【解析】句意:到国外旅行对这对老年夫妇的确有益，但这要看他们是否愿意(去）。根据句意可知，此处表示将来的动作，故用动词不定式,it作形式主语,指代后面的从句；remain后面须用不定式的被动形式，故选B项。