. Put a tag question at the end of the sentences
1. In big cities, life can become very difficult and unpleasant, ____________?
2. The world will soon become overpopulated, ____________?
3. You haven’t gone to Rio de Janeiro, ____________?
4. They didn’t like the film, ____________?
5. Jeju Island looks very peaceful, ____________?
6. We don’t have to go yet, ____________?
7. You don’t like pollution, ____________?
8. I think a megacity is a very large city with big population, ____________?
9. You won’t tell anyone, ____________?
10. The number of English speakers is increasing very quickly, ____________?