----Have you finished reading the book ?--Yes. I have finished reading itA. yet：yetB.

问题补充：

----Have you finished reading the book ?

----Yes. I have finished reading it．

A. yet：yet

B. already；still

C. already；yet

D. yet；already

答案：

A. yet：yet

B. already；still

C. already；yet

(答案→)D. yet；already

解析：考查副词。句意：---你已经读完这本书了吗？---是的，我已经读完了。故选D。