They can't leave their dog behind when they go/ are on holiday.
There are no faster ways to get to the city center.
Though Mr. Benson is old, he runs 8 miles before breakfast everyday.
There's no need to make her change hẻ mind.
At no time did he suspect (that) the money had been stolen/ someone had stolen the money.
He greatly regretted not seeing Andrey on her trip to London.
The accident is thought to have been caused by human error.