Question

(a) is being polluted (ii) pollute
(iii) polluted (iv) have polluted
(b) (i) has discharged (ii) discharge (iii) had discharge (iv) discharged
(c) (i) contains
(ii) is containing (iii)
contained (iv) has contained​

Answer 1

Answer:

(a) is being polluted

(b) (i) had discharged

(c) (iii) Contained

Explanation:

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Answer 2

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Explanation:

1. is being polluted
2. discharge
3. contains