人教版九年级下册英语Unit 13 Section B（3a-Self Check）课时练答案
1课前自主预习答案
A． 写出下列单词的名词形式。
1． invention
2． education
3． congratulation
4． protection
B． 写出下列单词的形容词形式。
1． careful
2． useful
3． helpful
4． forgetful
C． 写出下列单词的副词形式。
1． noisily
2． easily
3． clearly
4． luckily
2课堂合作探究写作指导答案
One possible version :
It's our duty to protect the earth． I always turn off the lights when I leave a room． While I am washing my hair, I usually turn off the shower． Besides, I stop using paper napkins and if I want to shop, I always take my own bags instead of using plastic, bags． I have decided to do more things to protect our earth, such as stopping riding in cars and riding a bike, and recycling books and paper． I think my actions can make a difference !
3课堂合作探究达标检测第Ⅰ题答案
1． sharks
2．harmful
3．recycling
4．wooden
5．costs
4课堂合作探究达标检测第Ⅱ题答案
1． turn; into
2．throw; into
3．makes a difference
4． play a part in
5．used to
5课堂合作探究达标检测第Ⅲ题答案
| 1 | 2 | 3 | 4 | 5 |
| B | A | C | B | C |
6课后巩固提升第Ⅰ题答案
1． have been given
2．turning
3．pollution
4．differences
5．suddenly