| A．am | B．is | C．are |
| A．plant trees (2)  | B．water flowers (3)  | C．cut down trees (4)  | D．clean and green |
E. Tree Planting Day 
| A．cut down trees (2)  | B．water trees (3)  | C．make the place clean (4)  | D．plant trees |
| A．so | B．but | C．because |
| A．in | B．at | C．on |
| A．take care | B．look like | C．look after |
| A．am | B．is | C．are |
| A．us | B．we | C．our |
| A．plant | B．to plant | C．planting |
| A．us | B．we | C．our |
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