What is the chief cause of the accident?
It is I that am responsible for the accident.
How did the accident come about?
How did the accident come about?
How did the accident come about?
Where did the accident take place?
Where did the accident take place?
How did it come about?
Where did the accident take place?
We're looking into the cause of the accident.
We are looking into the cause of the accident.
Did you cause an accident?
The cause of the accident is a complete mystery.
Who is responsible for this failure?
When did the accident take place?
How did the accident come about?
I'll answer for this accident.