Fill in the gaps with the appropriate form of the words in brackets. Pollution is the introduction of (1) _______(HARM) materials into the environment. These materials are called (2) _______(POLLUTE). They can be natural, such as (3) ☐ (VOLCANO) ash or created by human (4) _______(ACTIVE), such as trash or runoff produced by factories. All these materials damage the quality of air, water, and land. Pollution is a (5) _______(GLOBE) problem. Urban areas are (6) _______(USUAL) more polluted than the countryside. Although it may seem (7) _______POSSIBILITY), pollution can spread to remote places where no people live. Annually the level of pollution tends to (8) _______(HIGH).

Ответ: Harmful, pollutants, volcanic, active, global, usually, possible, high

1. Pollution is the introduction of (1) harmful (HARM) materials into the environment.
2. These materials are called (2) pollutants (POLLUTE).
3. They can be natural, such as (3) volcanic (VOLCANO) ash
4. or created by human (4) active (ACTIVE), such as trash or runoff produced by factories.
5. All these materials damage the quality of air, water, and land.
6. Pollution is a (5) global (GLOBE) problem.
7. Urban areas are (6) usually (USUAL) more polluted than the countryside.
8. Although it may seem (7) possible POSSIBILITY), pollution can spread to remote places where no people live.
9. Annually the level of pollution tends to (8) high (HIGH).

Ответ: Harmful, pollutants, volcanic, active, global, usually, possible, high