Whether they can achieve success_________.
A.remains to be seen B.is remained to be seen
C.remains to see D.is remained to see
Whether they can achieve success_________.
A.remains to be seen B.is remained to be seen
C.remains to see D.is remained to see
A
remain 是一个不及物动词,不用被动,因此排除B和D两项,see的逻辑主语是whether they can achieve success,因此see 用被动形式。remains to be seen意思是“拭目以待”。