第一课时第一题答案
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
B | C | A | A | B | C | A | B |
第一课时第二题答案
1 | 2 | 3 | 4 |
T | T | T | T |
第一课时第三题答案
1. energy
2. Earth
3. plastic
4. paper
5. reuse
6. waste
第一课时第四题答案
1. save
2. use
3. useful
4. waste, reuse
第一课时第五题答案
1. We use water to clean things every day.
2. Most of our energy comes from coal and oil./ Most of our energy comes from oil and coal.
3. We should not cut down too many trees.
4. Is too much plastic bad for the Earth?