| A. Don’t play football on the road. B. Don’t pick flowers in the park. C. Don’t throw wastepaper on the floor. D. Don’t talk in the library. E. Don’t draw on the wall. F. Don’t eat in class. |
B. 
C. 
D. 
E. 
| A．We don’t throw waste paper on the floor. |
| B．Don’t throw waste paper on the floor. |
| A．Don’t write here! | B．Don’t eat in the library! |
| A．talk | B．to talk | C．talking |
| A．Don’t talk in class. | B．Don’t eat in class. |
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