20. As we all know, the Great Wall of China is one of the w__________ of the world.

19. When the boy’s father entered his room, he p__________ to be sleeping.

18. P___________, I think he is dishonest, but many people trust him.

17. The student was given a m___________ for winning the speech contest.

16.Nothing can _________ (替代) a mother’s love and care.

15. That dictionary b________ to the library. You should return it on time.

14. C___________ carefully before taking action.

12. In basketball match, Yao Ming has an obvious a____________ in height.

　13. In addition to the studies, students should pay a_________ to state affairs as well.

11.We mustn’t waste anything of great ______________(重要).

10. Liu xiang was so fast in the race that no one could _____ him

A run for　　 　　　　　　　　 B run against　 　　　　 C run at　　 　　 D run after