We can make a fire ______ the room warm so that we can chat for a while.

 ---Look! The light is still on. Is Mr Wu working in his office？---No, it _____ be Mr Wu. He has gone to Nanjing for a meeting. 

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

－Must we leave now?－No, we ________. We still have two more hours.

–I’m not good at English, Amy. What should I do?--You      practice it more. For example, you      read English every morning.