The book ( )by a famous writer.

题目

The book ( )by a famous writer.
选择
[a] was believed to write [b]believed to be written
[c]was believed to be written
[d]believed to write
请说明理由为什么选它

答案

C
The book was believed(by us 省略了) to be written by a famous writer
书是被写的,所以被动语态：be written