【题目】We all feel it is Jack as well as his wife that ________for their son’s bad performance at school.
A. are to blame B. is to be blamed
C. are to be blamed D. is to blame
在线课程【答案】 D
【解析】
试题分析：考查主谓一致。作主语的是Jack，所以用单数，be to blame for是固定短语，意思是“应对……负责”。故选D。