no one believed that the accident had happened [ ] A of itself B on itself C in itself 做一

题目

no one believed that the accident had happened [ ] A of itself B on itself C in itself 做一

答案

A
by itself
单独地; 孤零地; 独立地; 自动地
in itself
本身, 实质上, 就其本身来说
of itself
自行, 自然而然地