13. When I came in, I found Lucy _________ by the window_________ to music.

A. sitting; listening　 B. sit; listen　　　　　 C. sitting; listen　 　D. sit; listening

12. --Why did you go back to the shop?

--I left my friend ________ there.

A. waiting　　　　　 B. to wait　　　　　　　 C. wait　　　　　 D. waits

11．When the telephone rang, I happened _________ in the kitchen, but when I came over to get it, it rang off.

A. to be cooking　　　　 B. to have cooked　　　　　 C. to cook　　　　　　 D. having cooked

10. Loulan City is believed by many people _________ by sandstorms between AD 200 and AD 500.

A. to be covered　 B. to have been covered　 C. to cover　　　　　 D. having been covered

9. The crowd cheered wildly at the sight of Liu Xiang，who was reported 　　　　　　 　the world record in the 110-meter hurdle race.

A. breaking　　　　 　 B. having broken　　　　　　 C. to have broken　　　　　 D. to break

8. He told us whether _________ a picnic was still under discussion

A. to have　　　　　 B. having　　　　　　 C. have　　　　　　　 D. had

7. Susan wanted to be independent of her parents. She tried　　　　　　　　　　 alone，but she didn’t like it and moved back home.　

A. living　　　　　　 B. to live　　　　　　　　　　　　　 C. to be living　　　　　　　 D. having lived

6. There is nothing more I can try　　　　　　　 you to stay，so I wish you good luck.

A. being persuaded　　 B. persuading　　 C. to be persuaded　　　　 D. to persuade

5. -Jack, seeing the wonderful diamond necklaces on display, I can’t help ________one．

-Really? But I’m sorry I can’t help _________ one for you because I know little about it.

A. buying; choosing　 B. to buy; to choose　　 C. buying; to choose　　　 　 D. to buy; choosing

4. After he became conscious，he remembered　　　　 and　　　　 on the head with a rod.　

A. to attack; hit　 B. to be attacked; to be hit　　 C. attacking; be hit　　　　 D. having been attacked; hit