27. It's important to understand other people, especially people from different b　　　　　　 .

26. When you are learning new things, it is important to make use of p　　　　　 　knowledge.

25. A c　　　　　　　 　is held every year to remember those who died in the war.

24. If we only look for the correct answer and r　　　　　　　 　ideas that don't provide a complete answer, we may get stuck.

23. The new machine is protected by p　　　　　　　 (专利).

22. Slow children need lots of e　　　　　　　 　when they are learning new things.

21. Blindness is a very serious d　　　　　　　 .

20. The overseas Chinese students stood there, __________ our national flag __________ with tears in their eyes.

　 A. watched, risen　　　　　　　 B. watching, being raised C. watched, rising　　　 D. watching, raising

19. We came to a place __________ they had never visited before.

　 A. to which　　　　　　　 B. where　　　　　　　　　　　 C. that　　　　　　　　　 D. whose

18. I ought to have insisted __________ a complete rest before you left London.

　 A. your taking　　　　　 B. on your taking　　　　　 C. for you to take　 D. your to take