They always give their vacant seats to （ ） comes first.

She likes to quarrel （ ） neighbors （ ） the little things.

I suppose that when I come back in ten years’ time all these old houses _____ down.

I don’t like to _____ a room with a stranger.

_____ some more time, and I will find a solution to the problem.

Such problems （ ） air pollution and traffic jams are becoming more and more serious in some big cities.

So, （ ）, we’ve got to try further funding.

Some cities have passed laws that allow coal and oil_____only if their sulfur content is low.

We’re going to _____ the task that we haven’t finished.

He criticized everything and everybody, and even _____ his few friends.

_____ finished his work, he had to stay at home on the weekend.

（ ） you do, you should put your heart into it.