---Can you tell me whom the book in April ?---Sorry I don’t know.A. was written byB

问题补充：

---Can you tell me whom the book in April, ?

---Sorry, I don’t know.

A. was written by

B. was written

C. is written

D. is written by

答案：

(答案→)A. was written by

B. was written

C. is written

D. is written by

解析：句意：你能告诉我这本书是谁在四月写的吗？对不起，我不知道。动作的承受者作主语，用被动语态。其结构是，主语+be+done.为了说明动作是由谁做的，经常在句末加by sb.根据该句是过去时态，故选A。