Section B 3a～Self Check第一题答案
（一）
1、burn
2、airport
3、unexpected
4、above
5、backpack
6、aiive
7、block
8、overslept
9、pies
10、hcan
11、market's
（二）
1、woke up
2、went off
3、had shown up
4、stayed up
5、get dressecf
Section B 3a～Self Check第二题答案
（一）
| 1 | 2 | 3 | 4 | 5 |
| B | D | B | C | D |
（二）
1、What had
2、Why were
3、I haven't
4、hadn't
5、Had； left
6、have been married
7、had been on
Section B 3a～Self Check第三题答案
（一）
1、have been
2、doesn't want .
3、was smoking
4、coming
5、threw
6、wiil be sent
（二）
One possible vrsion：
One day Iwent home by bus. Then I saw an old man get on the bus with his grands. on. The boy was about ten years old The old man，was carrying the boy's schoolbag. Igave my seat to him at once. However， the boy sat down first. The olo m. ari had to stand nearby. After a while， the boy shoured to his grandpa for water， and drew something on the window of the bus.
When I saw this， I got very angry. I think tlne boy should not only respect and take care of the old man but also keep the environment clean. And the old man shouldn't love his grandson in this way.
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