Listen! Someone is knocking atthe door. Who _____it be—It_____be Tom. He phoned tovisit me this evening.

John thinks it won’t be long he is ready for his new job

Experts are trying to work out a plan to deal with the problems caused by global warming________it is too late.[ ]

There is no denying the fact that as one grows older，one’s memory ______.[ ]

I have always wanted to go to a good place in the country for a holiday , and now I___about where it should be