5. He landed in the hospital after the crackup.
在交通事故后，他被送入医院。
还能这样说：
He was sent to the hospital after the crackup.
He was taken to the hospital after the crackup.
应用解析：
crackup意思有：（汽车、飞机等）失事，交通事故；精神或肉体之崩溃；
例如：He died of the air crackup.
他死于飞机失事。
6. Traffic accidents cause many fatalities.
交通事故造成许多人死亡。
还能这样说：
Many people are killed by the traffic accidents.
Lots of people meet the death in the traffic accidents.
应用解析：
cause指产生结果的原因或使某事发生的原因；
reason指根据事实、情况或产生的结果，推导出结论的理由或道理。
7. What a terrible accident!
这事故太可怕了！
还能这样说：
How terrible the accident is!
The accident is awful.
应用解析：
terrible storm 可怕的风暴；
a terrible temper 极坏的脾气；
a terrible performance 很糟糕的表演
8. The fog was responsible for the accident.
雾造成了这次交通事故。
还能这样说：
The accident was caused by the dense fog.
The fog led to the accident.
应用解析：
responsible for 对某人负责