The river have ________, so they will have to spend much money irrigating(灌溉) the crops.

The thief was about to leave the room when the police ______ and caught him.

It was difficult to get a word in. Everyone ______ so excitedly about the new film.

Is there anything you’d like for dinner?—No, nothing ____

When did you get to know the professor over there? —It was at the work shopwe did reserch to gether two years ago.