=>
1/
1. which
2. on
3. despite
4. however
5. whom
6. at
2/
1. C to clean and decorate their homes
2. A is celebrated in many countries around the world
3. E as long as they are good 
4. F we should buy candles and matches
5. B they arrived at school on time.
6. D as it will be raining hard.

3/
1. was killed
2. being caught
3. funnel-shaped
4. largest
5. weatherman
6. visit
7. to send
8. distinguishes

4/
1. damage -> be damaged
2. where -> which
5/
1. The car which won the rce looked very modern.
2. Although Mrs.Lan was tired, she helped Hoa with the homework.
3. I suggested that we should finish the work by Friday.
4. She wishes she knew how to get access to the Internet.

6/
1. advantages
2. part
3. cultural
4. relatives

7/
1. F
2. T
3. F
4. T