用and, but, or填空: 1. Hurry up, _________ you’ll be late for school. 2. Who’s the youngest, Rose, Helen ________ Betty? 3. Work hard, ______ you will succeed. 4. Excuse me, _______ could you tell me the way to the post office? 5. I’ll see you either on Monday _______ on Tuesday. 6. Put your coat on ______ you’ll be cold. 7. I’m sorry, _______ could you repeat that, please? 8. There is no one here ______me. 9. She can do anything _______sing. 10. The sky is blue ________ everything is beautiful. 11. We were very tired _______ we were very happy. 12. He never smokes ________ drinks. 13. There is no air ______ water on the moon. 14. Your classroom is clean _______ tidy. 15. My house is small _______ lovely. 16. Lucy worked hard at English ______ she came first in the English exam. 17.It is hot today, ______ some boys are still playing basketball outside. 18. People can’t live without air _____ water. 19. The Summer Palace is large _______ beautiful. 20.He looks tall and strong ______ he is afraid to go out at night.