题目内容
A red sky in the morning ______ to be a sign of bad weather.
A. says B. is saying C. has said D. is said
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。
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题目内容
A red sky in the morning ______ to be a sign of bad weather.
A. says B. is saying C. has said D. is said
D
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。