Complete the sentences using the correct forms of the words in 1.

1. Higher _________ can result in increasing crime rates in big cities.

2. Not many young couples can _________ to buy their own house in big cities.

3. There is a shortage of affordable _________ in big cities.

4. Since they started using farmland for building houses, many towns have _________ into cities.

5. Many people are leaving the countryside in order to _________ better opportunities in big cities.