问题补充：
—Wang Wei, what are you doing ?
—I’m reading .
A. Mo Yan wrote a book
B. a book written by Mo Yan
C. a book was written by Mo Yan
D. a book to be written by MoYan
答案：
A. Mo Yan wrote a book
(答案→)B. a book written by Mo Yan
C. a book was written by Mo Yan
D. a book to be written by MoYan
解析：句意:-王伟，你在做什么？-我正在读一本莫言写的书。written by Mo Yan是一个过去分词短语，在句中做定语修饰a book，放在所修饰词的后面，与a book 构成被动的关系，并且表示动作已经完成。D选项中to be written 是动词不定式的被动形式，也表示被动，但经常表示一个还没发生的动作，故不符合句意。故选B。
