问题
选择题
Many developed countries have agreed to help the less developed ones but it remains ________ whether they will take action or not.
A.to see
B.to be seen
C.seeing
D.seen
答案
B
题目分析:句意:很多发达国家已经同意帮助不太发达的国家,但是是否他们会采取行动还要拭目以待。Remain后面可以接不定式,表示将要发生的动作,而且it和see是被动关系,用不定式的被动,所以选B。