问题补充:
We all thinks that Jack for his son’s bad performance at school.
A. is to blame
B. is to be blame
C. are to be blamed
D. are be blame
答案:
(答案→)A. is to blame
B. is to be blame
C. are to be blamed
D. are be blame
解析:考查词组:be to blame应该受责备,这个短语是主动表示被动,句意:我们都认为杰克应为他儿子在学校的不好行为受责备。选A。