问题补充:
---Have you returned the book to the library ?
---Yes, I have retuned it.
A. yet, yet
B. already, already
C. already, yet
D. yet, already
答案:
A. yet, yet
B. already, already
C. already, yet
(答案→)D. yet, already
解析:句意:你已经把书还了图书馆吗?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。