20. Information has been put forward ____more middle school graduates will be admitted into universities.

A. while　　 B. that　　　 C. when　　　 D. as

19. Don’t leave matches or cigarettes on the table within _______ of little children.

　 A. hard　 B. reach　 C. space　 D. distance

18. Your composition is written very well ______________ some spelling mistakes.

　 A. except for　 B. except that　 C. besides　 D. except

17. ________ makes mistakes must correct them.

A. Who 　　 B. That　　　 C. Whoever 　　 D. Whatever