【题目】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
在线课程【答案】A
【解析】动词blame用法如此：blame sb for sth因为某事责备某人；blame sth on sb把某事归咎于某人；be to blame应受责备（用主动语态表示被动含义）；句意：一些专家认为爷爷奶奶应该为那些被宠坏的孩子负责。故使用A项主动语态表示被动含义。故A正确。