第一节：单项选择（共15小题；每小题1分，满分15分）
21. My summer job wasn’t ____ fun, but it was ____ real learning experience for me.
A. a; a B. the ; / C. / ; a D. a ; /
22. --- Is there anything wrong with my heart?
--- ______ . Take it easy.
A. Nothing serious B. That’s right C. Don’t mind D. Keep calm
