问题
选择题
It is you as well as your wife that ______ your son's bad performance at school.
A．is to be blamed for
B．are to be blamed for
C．are to blame for
D．is to blame for
答案
答案：C
题干中用了强调结构，主语是you，所以谓语要用复数；be to blame是固定句式，用主动形式表示被动意义。