30. _______ well prepared you are, you still need a lot of luck in mountain climbing.

　 A. However　　　 B. Whatever　　　 C. No matter　　　 D. Although

29. I am sorry for what I said in the meeting. I would rather I ___________that then.

　 A. did not say　　 B. hadn’t said　　　　 C. would not say　　 D. don’t say

28. Customers are asked to make sure that they　_______the right change before leaving the 　　　　　　　　shop. A. will give　　　 B. have been given　　 C. have given　 　　D. will be given

27. _______ most school teachers were men, but today there are more women than men.

　 A. All the time　　　 B. At one time　　 C. At a time　　　 D. At times

26. This kind of fish can eat a person in two minutes, _______ only the bones.

　 A. left　　　 B. being left　　　　 C. leaving　　　 D. having left

25. The teachers do all ______ improve their teaching abilities.

　 A. that they can　　　　　　 B. they can to

　 C. what they can to　　　　　 D. which they can

24. They say your report doesn’t ______ the fact. But I don’t ______ them on this point.

　 A. agree to; agree with　　　　　 B. agree on; agree to

　 C. agree on; agree with　　　　　 D. agree with; agree with

23. The lawyer seldom wears anything other than a suit _______ the season.

　 A. whatever　　　 B. wherever　　　 C. whenever　 　D. however