21.Please sign your name at the _________(底部) of this article

20. Press this ______(按纽), and the door will open of itself.

19. Don't disturb him, as he is _________(埋葬) himself in study.

18. It being cold tonight, you might as well cover yourself with the _________(毛毯).

17. KFC has many __________(分店) in China.

16.Most of the tourists are struck by the ______(美丽) of the West Lake

15.At the sight of his former girl friend, he felt his heart _____(心跳) fast

14. They traveled across the world in 80 days with a hot ______(气球).

13. The car was a ________ (廉价货) at that price.

12. We had great difficulty in _______ (呼吸), for the air is thin.