Mr. Smith was the only one of those who to the dinner.
A. were invited
B. were inviting
C. was inviting
D. was invited
网友回答
A. were invited
B. were inviting
C. was inviting
(答案→)D. was invited
解析：考查定语从句，主谓一致和语态。这个定语从句的先行词是the only one，是因为有only修饰表示强调。根据句意可知是被动关系。