–There is interesting book on the teacher’s desk.--Oh book is Wei Fang’s.A. an; theB.

问题补充：

–There is interesting book on the teacher’s desk.

--Oh, book is Wei Fang’s.

A. an; the

B. the; the

C. the; a

D. a; the

答案：

(答案→)A. an; the

B. the; the

C. the; a

D. a; the

解析：句意：在讲桌上有一本有意思的书。哦，这本书是王芳的。首次提到的人或物用不定冠词a/an,再次提到上文出现过的人或物应该用定冠词the。不定冠词an用在以元音因素开头的单词前，其余用不定冠词a.故选A。