The book by the young writer sells well. It is popular among middle school students.A. was

问题补充：

The book by the young writer sells well. It is popular among middle school students.

A. was written

B. writing

C. wrote

D. written

答案：

(答案→)A. was written

B. writing

C. wrote

D. written

解析：这个年轻作家写的这本书卖得很好。在中学生间很受欢迎。结合语境可知本句描述的是过去的动作，故谓语动词用过去时态句子主语the book是动作对象，故用被动语态。选A。