1. 4.while eating or drinking 5.eat with your mouth open
1.table manners
2.the school hall
3.the purpose of the talk
4.while eating or drinking
5.eat with your mouth open
6.talk with food in your mouth
7.reach over someone's plate for something
8.wait for everyone to finish
9.at the table
10.above all
11.a lot of advice on the table manners
12.find them useful
13.make sure
14.both…and…
15. No smoking

2. 16. No parking
17. No littering
18. be bright in colours
19. take a photo of it
20. It says “No photos”.
21. Public signs keep us safe from danger and warn us not to do something.
22. You should not start eating until everyone is ready.
23. I didn’t notice that sign just now.
24.I won't leave until the boss comes back.
25. They didn't realize the importance of protecting the environment until they read the report.

3. 二、
1. discussion
2. politely
3. successfully
4. running
5. tips
6. avoid
7. practice
8. subject
9. expressing
10. Parking 三、
CDBDB
6-10 ABDCD
11-15 BDBCB 四、
1. ...as the saying goes...
2. ...laughing or shout loudly.
3. ...put the books back after reading (them).
4. ...greets us with a smile
5. ...too tired to go on / continue

4. 四、
6. ...do as she does.
7. ...instead of avoiding; problem
8. ...was too excited to express himself clearly.
9. ...the advice on table manners (is) useful.
五、6-10 DABDC
六、1-5 CBDAA CBDBB
七、A. 1. everywhere sitting
3. 50/fifty near
5. more
B. 1. Different eating / having
3. finish proper/polite/ right
5. Usually