(一) 根据句意选用 and, but, or, so, while, for 填空。 1. The ground is wet, _________ it rained last night. 2. It's a fine day today, _________ everyone is busy. 3. This is our first lesson, _________ I don't know all your names. 4. Take an umbrella with you, _________ you'll get wet. 5. Do you understand what I said _________ do you want me to explain it again? 6. We have classes in the morning, _________ we don't have classes in the afternoon. 7. She is a doctor _________ I am a teacher. 8. Use your head, _________ you'll find a way. 9. They went to the zoo yesterday, _________ they didn't see any animals. 10. I must go now, _________ it's getting dark.