【正文】
more than 2 billion. F. I think we must do something to control the population. Unit 2 Ⅰ . 1. taxes 2. crime 3. suburb 4. fault 5. visions Ⅱ . 1. flats 2. rubbish 3. law 4. police 5. Add Ⅲ . 1. to live 2. catching 3. to walk 4. room 5. happen ing Ⅳ . 1. add, to your coffee 2. It’s difficult to run a big city 3. be more schools and hospitals 4. is close to 5. in the distance 6. build flats around the edge of 7. own private cars 8. closed down Ⅴ . 15 BEAFD