被动题,英语,时间.Who was this book ( )?A,written B,written by为什么

被动题,英语,时间.
Who was this book ( )?
A,written B,written by
为什么

b
whom was this book written by
书是被写
被某人写是be written by sb

B,written by
译文：这本书是谁写的？
be written by sb. 由某人写的

b

b this book was written by who

B