从右栏选项中选出与左栏各项相配的答语，井将所选项的字母符号写入答题纸上。
() 21. How do you do？ A. No, I'm an officer.
() 22. Where is the new library？ B. How do you do？
() 23. You are a teacher, aren't you？ C. No, thank you.
() 24. Do you often play basketball？ D. Yes, I do.
() 25. Would you like some water？ E. It is just at the right corner.