| 听短文，填空。 |
| We are students of No.5 1_____. We did a survey about 2_____. We went to a paper factory a few days 3_____. The paper factory is close to a lake which gives us 4_____ water. But we found the dirty water from the factory ran into the lake. Now the water in the lake is very dirty. By the time we got there, lots of fish had already been dead. Some farmers living near the lake said that some of their sheep had 5_____. |