It is not I but Tom and his wife that for the car accident.
A. am to blame
B. are to blame
C. am to be blamed
D. are to be blamed
网友回答
A. am to blame
(答案→)B. are to blame
C. am to be blamed
D. are to be blamed
解析：强调句型，强调部分为not…but…, not…but…连接两个名词作主语时谓语动词与but后面的主语保持一致；sb be to blame主动表被动，因此选B。