（）21.You must have your hair _____.
A. cutted B. cutting C. cuts D. cut
（）22. ---Let’s join the music club. ----.
A. Good idea. B. That’s right. C. I think so. D. It’s relaxing.
（）23. Hurry up,you’ll be late.
A. and B. so C. but D. or
（）24. How long have they ____ this new car?
A. bought B. buy C. have D. had
（）25. How____ is the population of the world?
A. many B. much C. large D. small