A red sky in the morning to be a sign of bad weather. A. says B. is saying C. ha

A red sky in the morning ______ to be a sign of bad weather.

A. says                B. is saying  C. has said            D. is said

试题答案

D

解析:

因为主语 a red sky 与谓语动词say之间为被动关系，故用被动语态。