All books ______ to the library more than three days late will be subjected to a fine.
问题描述：
All books ______ to the library more than three days late will be subjected to a fine.
A.return \x05\x05\x05B.returning \x05C.to return \x05\x05\x05D.returned
答
D all books (that is) returned to the library 省略that is 表示“被还回图书馆的书”为什么不选A啊书是“被”还回去书不能自己把自己还回去啊原来如此 谢谢你！