Rewrite the sentences so that they have the same meaning as the original ones:
1.A group of foreigners visited the slums last week, didn't they? ( VISIT)
2.The countryside doesn't suffer as much pollution as the city (LESS)
3.Does overpopulation cause a lot of social problems in this area ? ( CAUSE)
1. A group of foreigners visited the slums last week, didn't they? (visit)
=> Did a group of foreigners visit the slums last week ?
2. The countryside doesn't suffer as much pollution as the city. (less)
=> The city doesn't suffer as less polution as the countryside.
3. Does overpopulation cause a lot of social problems in this area? (cause)
=> Are overpopulation the causes of social problems in this area?