简介： IV单项选择。 从各题所给的四个选项中选出最佳答案。（每小题1分，共15分） （ ）21. --- do you improve your English? ---By listening to tapes and reading aloud. A. How B. Why C. Whose D. When （ ）22. He was so when he heard the news that he got the first prize in the co...