二、单项选择（15分）
在下列各题A、B、C、D四个选项中选择一个能填入题干空白处的答案。
21.--- Have you ever seen _____ one-eyed elephant ?
--- No, never. And you?
A. a B. an C. any D. some
22.---- What are you going to do in the future?
---- I’d like to be a teacher _____ you are.
A. so B. as C. what D. like
