用所给词的适当形式填空。
1. Look! Whose ________ (Walkman) are these? Perhaps they are the twin's.
2. Is there an ________ (electric) shop in your town?
3. Amy wants to buy some presents for ________ (they).
4. Do you understand the ________(mean) of the new world?
5. Do you like to have cold ________ (drink)?
6.We usually go ________ ( shop )on Sundays.
7. Listen !Someone ________ ( knock )at the door.
8. Would you please show ________ ( I ) your pictures?
9. There ________ ( be ) a pair of shoes.
10. I have many different ________ ( kind ) of books.
11. It's twelve o'clock now. The students ________ (have) their lunch. They ________ (have) rice, meat and vegetables for their lunch.
12. Amy ________ (watch) TV every day. She ________ (watch) TV now.
13. I like ________ (drink) coffee.
的是（）