Ⅱ．知识运用(两部分，共20小题，计20分)
A】单项选择从A、B、c三个选项中选出最佳答案填空。(共10小题。计10分)
21. _______ big the tree is! ( )
A. What B. How C. What a
22. _______ of my parents are good at English. ( )
A. All B. Either C. Both
23. -- What's wrong with you, Sandy? You look so worried.
-- My pet cat _______ by a car this afternoon. And it is in hospital now.( )
A. is hit B. was hit C. hit
24. Look at that red car! I think it's _______ in the world. ( )
A. more beautiful B. so beautiful C. the most beautiful
25. --When did your father come back last night?
--He didn't come back _______ he finished all the work. ( )
A. until B. while C. if