21. When you finish watching the movie, you will have ____ better understanding of ____ life.
A. a; the B. the; a C. a; 不填 D. 不填; the
22. It’s too late. Go to bed right away. Forget you need to get up as early as you can ______ the
early train?
A. catch B. catching C. caught D. to catch
23. —I’m not good at dancing, you know.
