Keys to exercises 13.

A. 1. In a school just outside Edinburgh.
   2. Once a week.
   3. He wanted to ask him if he could just watch for the first
      week and start the actual teaching the following week.
   4. Wales.
   5. In the back row.

   6. They talked incessantly and threw things at each other.
   7. The bell rang.
   8. Because they saw the headmaster watching them
      through the window.
   9. Because he behaved so well when all the other
      teachers thought he was the worst boy in the class.
  10. He says that we foreigners must stick together.

B. 1. Yes, it is.        No, it isn't.
   2. Yes, he has.       No, he hasn't.
   3. Yes, he did.       No, he didn't.
   4. Yes, he does.      No, he doesn't.
   5. Yes, he has.       No, he hasn't.
   6. Yes, they were.    No, they weren't.
   7. Yes, he was.       No, he wasn't.
   8. Yes, I am.         No, I'm not.

C. 1. Come and see me after the lesson, Robinson.
   2. Don't come to my study before ten o'clock.
   3. Watch out for the Welsh boy, Henry.
   4. Don't throw things at me, Jones.
   5. Don't pretend to be ill.
   6. Please explain, Jones.
   7. Please don't talk about your problems in the staff
      room, Robinson.
   8. Please listen to me, boys.

D. 1. He was very rude, wasn't he?
   2. He didn't do anything, did he?
   3. He looked perfectly well, didn't he?
   4. He didn't fall down on the floor, did he?
   5. You're not feeling well, are you?
   6. You're pulling my leg, aren't you?
   7. I'm late, aren't I? (am I not?)
   8. We foreigners must stick together, mustn't we?