Leia o texto e responda às questões 4 e 5:THE WATER WE DRINK

The water we drink usually comes from reservoirs, lakes

or rivers. A large number of cities use river water and

dumps back into the river. Sometimes another city

downstream uses the same water. This water may be

badly polluted with chemicals and pathogenic bacteria.

Many different chemical treatments are necessary to

make it safe and palatable.

Many communities add some form of fluorine to their

water. Fluorine in concentration of 0.7 to 1.0 ppm

(parts per million) can significantly reduce tooth decay

in children.

Smaller communities usually obtain water from wells.

Even they have problems because sometimes the

ground water is contaminated by nitrates. These

nitrates come from agricultural fertilizers and from the

decomposition of organic waste.

What can we do? We can fight for clear water and

convince our neighbors to do the same. We can

demand an end to water pollution industries and cities.

And, finally, we must know how to use the water of the

earth because that is all the water we have.

4- Analise as afirmativas abaixo como verdadeiras ou

falsa e assinale a alternativa certa.

( ) Nitrates pollute the water.

( ) People dump purified water into the water.

( ) We usually drink water from reservoirs.

( ) Fertilizers purify the water.

( ) We can’t drink safe water.

a) V, F, V, F, V.

b) F, V, V, V, F.

c) V, F, V, F, F.

d) F, F, F, V, V.

5- Escolha a alternativa correta de acordo com o texto

acima:

We can:

a) demand an end to water pollution.

b) stop the decomposition of organic wastes.

c) use river to purify the water.

d) convince our neighbors to use fluorine.