— Who do you think should answer for Li Tianyi’s behavior?
— Actually, I think it is their parents .
A. who are blamed
B. that are to blame
C. which are to blame
D. what are blamed
网友回答
A. who are blamed
(答案→)B. that are to blame
C. which are to blame
D. what are blamed
解析：考查强调句和词组：句意：--你认为谁应该为李天一的行为负责？--实际上，我想他的父母应该受到责备。这句话是强调句：it is/was+强调句+that/who+其余部分，排除C，“应受责备”是be to blame，选B。