Question

9. Read the text and fill in the gaps with the correct form of the verbs as
per subject and context.
Air (a)
---(be) an important element of the environment. But it is
constantly being (b)------(pollute) in many ways. We make fire to cook food
and (c) ----(do) many works. This fire emits smoke which (d)
(contaminate) air. Vehicles pollute air to a great extent by (e)-----(burn)
fuel. Air pollution also (f) ----(happen) when coal and oil (g)-----(burn).
Mills and factories can be (h) - (hold) responsible for this pollution. It is
high time we () ----(check) air pollution. Otherwise, we () ----(suffer) a lot.​

Answer 1

1. being
2. polluted
3. do
4. contaminates
5. burning
6. happens
7. burnt in
8. . holds
9. check
10. will suffer

Answer 2

Explanation:

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