选出不同类的单词
1. A. first B. four C. second
2. A. library B. gym C. water
3. A. way B. lunch C. dinner
4. A. art B. now C. music
5. A. thirty B. forty C. over
6. A. London B. Moscow C. class
7. A. rainy B. kid C. snowy
8. A. book B. hot C. cold
9. A. window B. wall C. ball
10. A. he B. what C. she