---Must I go to medical school and be doctor like you，Dad？--- No, you __________, son. You’re free to make your own decision. 

You ______ your coffee before it turns cold.

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

As we all know, it is usually cold in this place in January, but it _____ be warm sometimes.

I'm afraid Mr.Harding ______ see you now.He's busy.