III.
1. More people enjoy going out by bicycle. 
2. Do you think skating more dangerous than mountain climbing. 
3. Nam has more than 1,000 stamps in his collection. 
4. You will get sunburn if you don't have a hat. 
5. He has a bad toothache because he eats too much candy. 
IV.  
1. F.
2. T. 
--------- 

1. No, he doesn't. 
2. The children lie on the grass, looking at the sky and daring each other to find the Milky Way. 
3. I like living in the city. Because it is very exciting.

1. More people enjoy going out by bicycle. 
2. Do you think skating more dangerous than mountain climbing. 
3. Nam has more than 1,000 stamps in his collection. 
4. You will get sunburn if you don't have a hat. 
5. He has a bad toothache because he eats too much candy. 
  6. F                    7. T. 

8. No, he doesn't. 
9. The children lie on the grass, looking at the sky and daring each other to find the Milky Way. 
10. I like living in the city. Because it is very exciting.