Old people must .A. speak to politeB. be spoken politely C. be spoken to politelyD. be spo

发布时间：2020-08-22 00:40:58

Old people must     .
A. speak to polite
B. be spoken politely
C. be spoken to politely
D. be spoken to polite

网友回答

A. speak to polite
B. be spoken politely
(答案→)C. be spoken to politely
D. be spoken to polite
解析：此题考查含有情态动词的被动语态的基本构成。情态动词+be+过去分词
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