It was a bit doubtful at first, but it ____  to be a really good idea.

The computer system _______suddenly while he was searching for information on the Internet.

The doctor tried his best to save this patient.At last he began ___.

The pavements are designed to provide easy access for the blind to _______conveniently, which is          bound to_______ active effects on people’s opinion on the government’s performance.

We are at your service. Don’t       to turn to us if you have any further problems.