-Excuse me, is there book by Mo Yan? -Yes. It’s on bookshelf over there.A. a; /B. a; the

-Excuse me, is there book by Mo Yan?
-Yes. It’s on bookshelf over there.
A. a; /
B. a; the
C. / ; the
D. the; a

A. a; /(答案→)B. a; theC. / ; theD. the; a解析：句意：--打扰了，这有莫言写的书吗？--有。它在那边的书架上。分析第一次提到的事物有不定冠词。答语中对书架进行了特指，有莫言作品的书架。因此用冠词the.故选B

我也是这个答案