单项填空
21. What I am looking for is _____ book that contains _____ ABC of computer.
A. a；不填 B. a; the C. the; an D. the; 不填
22. The new school building offers easy ______ to wheelchair users.
A. solution B. method C. access D. way
23. The CDs are on sale！Buy one and get ______ completely free!
A. other B. others C. one D. ones
24. In order to keep fit, you will take exercise _______ and eat healthily.
A. regularly B. generally C. approximately D. extremely
