I

1, There is a shortage of clean water in this country.

2, Children living in slums often suffer from malnutrition.

3, Overpopulation is a serious problem, isn’t it?

4, Overpopulation is causing more problems than we can imagine.

5, One of the main reasons causing air pollution is overpopulation.

6, There are less air pollution and traffic on the countryside.

7, Mumbai is one of the most densely populated cities in the world.

8, Traffic congestion is a major problem for many huge cities.

II

1, The government have to find a solution to reduce traffic jams.

2, How many people are there in Ho Chi Minh City?

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