_____________books you borrow from the library should be returne

_____________books you borrow from the library should be returned in two weeks' time.
A、Which
B、Whichever
C、What
D、Whatever
【正确答案】：D
【题目解析】：D.“无论哪本”是主语从句。句意：无论你在图书馆借了哪本书都必须在两周内还。A、B、C都不能在句首引导主语从句。