Some experts believe it is the grandparents who for the spoiled child.
A. are to blame
B. are to be blamed
C. should blame
D. are blamed
网友回答
(答案→)A. are to blame
B. are to be blamed
C. should blame
D. are blamed
解析：考查固定词组：be to blame“应受责备，对…负责”，注意这个词组是主动式表示被动，也就是不能用被动，句意是：一些专家相信应该对宠坏孩子负责。选A。
考点:考查固定短语