IV. 本题共有10个小题，请在四个选项中选出最佳答案。
21. We are planning ________11-day trip to Century Park. ______trip must be fun.
A.a.a B. an, a C. a, The D. an, The
22. Traveling abroad is becoming popular though it still _______too much.
A. pays B.costs C.spent D.spends
23. Don’t you think we have to _______ our hobbies because of the busy school work?
A.put up B.set up C.g ive up D.look up
24. Bicycling is good exercise, ______, it does not pollute the air.
A.however B.besides C.but D.except
25. Lei Fen is really an example for us all. Let’s keep it the legend _______.
A.live B.alive C.lively D.a life
