一、答案
| 1 | 2 | 3 | 4 | 5 | 6 |
| B | B | D | C | C | A |
二、答案
1、using
2、really
3、is
4、was doing
5、napkins
三、答案
1、recycling
2、napkins
3、took
4、used
5、staying
四、答案
1、does harm
2、be allowed
3、It's good for
4、are; used
5、instead of
五、答案
1、Cood idea
2、Can you ride a bike
3、Sometimes riding a bike or walkjng is faster than driving a car
4、But how to do it
5、You're welcome/Not at all