问题补充：
The children were for the accident. After all they were so young.
A. not to blame
B. to not blame
C. not blamed
D. to not be blamed
答案：
(答案→)A. not to blame
B. to not blame
C. not blamed
D. to not be blamed
解析：考查固定词组：be to blame应受责备，句意是：孩子不该为了事故受责备，毕竟他们还小。选A。
