To what extent will future scientific discoveries ____the pr
To what extent will future scientific discoveries ____the prolonging of human life? A.be made possible B.make possible C.make it possible D.be made it possible 答案是B,可是为什么,我不懂?急求详解,谢谢!
Future scientific discoveries will make the prolonging of human life possible to what extent ? 原句就是这样的 不用it做形式宾语 the prolonging of human life 是宾语 possible是宾语补足语