题目

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 答案： 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”。

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