1 . 听下面一段独白,回答以下小题。
1. How many American rivers are seriously polluted?
A.One-sixth of them. | B.One-third of them. | C.Half of them. |
2. When did Susan start the work of cleaning the river?
A.Three years ago. | B.Last August. | C.A few weeks ago. |
3. What did the students find when they came to the river this year?
A.There was no garbage left to clean up. |
B.The river had become clean that a lot of water birds came back. |
C.The river was much cleaner and they had to search for garbage. |
4. What was the expected reaction of the local people to the river?
A.Most of them would keep on throwing garbage into the river. |
B.They would join the students in changing the situation. |
C.They would become more aware of the pollution problem. |