They’ve made full preparations, but it remains ______whether they will be able to do a good job in the experiment.
A.to see
B.seen
C.being seen
D.to be seen
答案:D
题目分析:考查不定式的被动做表语:句意:他们已经做好准备了,但是是否在实验中能做得好还又待证实。It remains to be seen whether…,是否…还有待证实,这里不定式的被动做表语,选D。