问题
选择题
--Have you returned the book to the library _______? --Yes, I have ____ returned it.
A．yet, yet
B．already, already
C．already, yet
D．yet, already
答案
答案：D
题目分析：句意：你已经把这本书还给图书馆了吗？是的我已经归还了。yet用于疑问句，已经，用于否定句，还；already,用于肯定句，已经。故选D