It's thought that the accident was caused by human error.

The accident is ___________________________________________________________________

He was very sorry that he didn't see Andrey on her trip to London.
He greatly regretted _______________________________________________________________

I was going to leave, but because of what he said, I didn't.
She persuaded ___________________________________________________________________

It's my opinion that you should take more exercise.
If I ____________________________________________________________________________

He never suspected that the money had been stolen.
At no time _______________________________________________________________________

Is this the only way to reach the city centre?
Isn't there _______________________________________________________________________

He said he was not guilty of stealing the car.
He denied _______________________________________________________________________

It's not worth living to make her change her mind.
There's _________________________________________________________________________

I spent seven years at secondary school and then I went to university.
After ___________________________________________________________________________

Whenever she went to Paris she bought a new dress.
She never _______________________________________________________________________