【正文】
Unit 6 Pets Grammar A Before going to the library, your teacher may tell you what you should do and what you shouldn’t do. What will she say? Keep the library quiet. Keep the library clean. Read the book carefully. Keep the books clean… Do Don’t make much noise. Don’t write on the books. Don’t talk to your classmates loudly. Don’t take the books out of the library… Don’t 1. Give it clean water. 2. Change