21. If we expect much cleaner world, we should attract world's attention to protect it.
A. a; a B. a; 不填 C. a; the D. the; 不填
22. ---- Did you notice my little son Tom just now?
---- No, Mrs Black. I ___ _ computer games.
A. play B. am playing C. would play D. was playing
23. In China, peach is a of long life and therefore makes an ideal birthday present.
A. symbol B. sign C. signal D. symptom
24. The small mountain village where you took part in the summer camp last year lies in
is now part of Shanxi.
A. where B. that C. what D. which
25. The government has agreed to pay the firms extra sums to ___ _ for their financial losses.
A. make up B. bring up C. fill up D. look up
