听下面一段材料,回答第1至3小题。 |
1. Why do they collect the rubbish along the river? |
A. To stop the fiver from being polluted. B. To sell it for money. C. To see the river every day. |
2. How many volunteers do they have? |
A. 12. B. 16. C. 28. |
3. When do they do the volunteer work? |
A. At 7:30 every morning. B. After lunch at noon. C. After dinner every evening. |