15. It is said that bad living habits as well as dirty surroundings, stuffy rooms and some other factors ________ the wide spread of H1N1.

14. He packed his suitcase, ________ the door and rushed downstairs as fast as he could.

13. -I’ll repeat the phone number: 0571-88145412. Can you catch it?

　 -________.

12. It was ________ of my secretary not to have let others disturb me this morning when I was occupied with my work.

11. “Without Chinese toys, kids around the world ________ not have so much happiness.” said an European Union official.

10. I was lucky enough to get on the train before it ________.

9. The man must be the leader of the group, easily ________ by his special uniform.

8. Teamwork, or cooperation, is ________ it takes for a football team to win a game.

7. The missing children haven’t been found yet. Something terrible ________ to them.

6. -Hello, I’d like to see Doctor Smith at 3 o’clock tomorrow afternoon.

-Sorry, but he ________ a patient at that time.