第一课时第一题答案
1 | 2 | 3 | 4 | 5 | 6 |
C | C | B | C | C | B |
第一课时第二题答案
1 | 2 | 3 | 4 | 5 |
A | B | B | B | B |
第一课时第三题答案
1. bins
2. Smoke
3. messy
4. rubbish
5. clean
第一课时第四题答案
1. of
2. from
3. in
4. for
5. to
第一课时第五题答案
1. We can walk to school.
2. What can we do to keep our city clean?
3. We can move some factories away from our city.
4. Rubbish makes the streets messy and dirty./ Rubbish makes the streets dirty and messy.
第一课时第六题答案
1. Is the river dirty? Yes, it is.
2. What makes your city dirty?
3. What can you do?
4. We can’t put rubbish here.