I.

1. What happened to the electricity?
2. We need a better photograph.
3. He's studying photography.
4. You always need to prepare.
5. The car was sold.
6. You don't understand.
7. He doesn't understand her.
8. Where did you put it?
9. Open the door for them.
10. Please record it for me.

II.
    A. I lost my hat.
    B. What kind of hat?
    A. It was a rain hat.
    B. What color rain hat?
    A. It was white. White plastic.
    B. Mmm mm. Therre was a white hat in the car.
    A. Which car?
    B. The one I sold!

III.
    X.  Where are you going?
    Y. Europe.
    X. Where in Europe? To the north or to the south?
    Y. Neither. I've seen the north and the south. I'm going east.

IV.
    M. I bought some books at the library.
    N. They don't sell books at the library. They lend books there. They sell books at the bookstore. Didn't you know that?
    M. On Tuesdays they sell surplus books at the library.
    N. I didn't know that.
    M. There's a lot you don't know.

V.
    D.  Is the cat on the bed again?
    E.  No, she's under the bed.

VI.
    K. Where's Michael's English book?
    L.  I don't know. Ask him about it.