9. When did the accident happen?
交通事故是什么時候發生的？
還能這樣說：
What time did the accident happen?
When did the accident take place?
諺語：
Accidents will happen in the best-regulated families.
家規再嚴，丑事難免。
10. He was to blame or the traffic accident.
他應該對這一交通事故負責任。
還能這樣說：
He was responsible for the traffic accident.
He should take the responsibility for the accident.
應用解析：
blame sb. for the failure 因失敗而責怪某人；
blame on 把責任推給……
11. I witness a traffic accident on my way home.
我在回家的路上親眼目睹了一場交通事故。
還能這樣說：
I am a witness to the traffic accident on my way home.
I witness the traffic accident when I go home.
應用解析：
bear false witness against sb. 做對某人不利的偽證；
in witness of 作為……的證明，為……做證
12. I was petrified when two cars collided.
兩車相撞的情景把我嚇呆了。
還能這樣說：
I was struck by the two collided cars.
I was terrified by the sight which two cars clashed.