1. A. The plane doesn’t take off at four o’clock. 

B. The man has to take another plane.

C. The man will go back home.

2. A. He wants to have some sleep.    

B. He needn’t have any.

C. He is very sleepy.

3. A. He can swim very well.    

B. He wants to swim.

C. He has made some progress.