Odpowiedź :
1. When people don't do enough exercise, they often put on weight.
2. When a place becomes popular, it loses character.
3. Water freezes if you put it in the freezer.
4. If you put ice in water, it floats.
5. If a city has plenty of cycle lanes, it normally has less pollution.
6. When an animal is in danger of extinction, human activity is usually to blame.