第二课时第一题答案
1 | 2 | 3 | 4 | 5 |
B | B | B | B | A |
第二课时第二题答案
1. clean
2. dirty
3. factories, city
4. keep, clean
第二课时第三题答案
1. cities
2. make
3. litter
4. smoking
5. makes
6. to keep
第二课时第四题答案
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
B | C | C | B | B | C | B | C |
第二课时第五题答案
1. messy, dirty, keep, sweep, clean
2. from, makes, keep, clean, move, from, city