— I am going to spend my holiday in the countryside. — ________. The air there is fresh and the views are attractive as well.

—Is John coming by train?—He should, but he     not. He likes driving his car, but I’m not quite sure.

The Internet is really ________ to us. We can get a lot of things from it.

What              you do if you won in the lottery?

— There'ssomeone knocking on the door. Who _____it be?— It must be Mary. She promised to be here at 8：00.