—I'm going to clean the blackboard.
—But you can't do that.
—Why can't I?
—We haven't got a duster.
—Did you walk to the match?
—No. I went by car.
—Did John go by car, too?
—No. He cycled.
—Hello, and how did you spend the holiday?
—I played tennis till lunch time.
—What did you do after lunch?
—I went for a swim with John.
—Hello, why aren't you playing tennis?
—I haven't brought my racket.
—You can borrow mine, if you like.
—Oh, thank you. That's very kind of you.
—What are those shirts made of?
—They are made of cotton.
—Are shirts always made of cotton?
—No. They are sometimes made of wool or nylon.
—I'm going to drink some of this milk.
—But you mustn't.
—Why not?
—Because it's sour.
—Excuse me, Madam, did you drop your glove?
—I beg your pardon?
—I said "Did you drop your glove".
—Oh, yes, I did. Thank you so much.
—Not at all. It's a pleasure.
—Where have you