问题描述：
Mrs.White showed her students some old maps _________ from the library
A.to borrow B.to be borrowed C.borrowed D.borrowing
我知道答案是C 那么填to have been borrowed行不?
A.to borrow B.to be borrowed C.borrowed D.borrowing
我知道答案是C 那么填to have been borrowed行不?
问题解答：
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