一、单项选择（每小题1分，共计20分）从A、B、C、D四个选项中，选出可以填入空白处的最佳选项。
1. The education of _______young is always _______hot and serious topic in the modern society.
A. the;/ B. /;the C. the; a D. a; the
2. ---- Will you be this afternoon, John?
---- It depends, I’m afraid I’ll be called in by my manager.
A. suitable B. available C. accurate D. convenient
3. Personally I think it is the sales manager, rather than the sales girls, to blame.
A. is B. that is C. are D. who are
