21.（单选题）Too rich a ______ is not good for all of us.

31.（单选题）I’m sorry to say that I have no experience in this field.

30.（单选题）Students don’t change classrooms between periods-instead, the teachers move to different classrooms.

29.（单选题）I have to turn in my resignation two weeks before my last day.

28.（单选题）Maybe it’s just that Blue Monday feeling.

27.（单选题）If possible, the service hours should be extended until at least 10 p.m.

26.（单选题）If there’s anything you need, please don’t hesitate to ask.

25.（单选题）My new job offers me a lot of opportunities to move up.

24.（单选题）I don’t think the economy in my country will develop very fast in the next ten years.

23.（单选题）I’d like to talk about how to expand the export business of the company.

22.（单选题）Please let me know if I can help you with anything.