题干
---Who do you think is to blame for the boy’s behavior, Mary or her parents?
--- We all think it is Mary as well as her parents that ______ for their son’s bad performance at school.
--- We all think it is Mary as well as her parents 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 |
答案(点此获取答案解析）
