**4.**

Complete the following text with right forms of the verbs given in the box.throwkillworkhavereleasebeensureliveoriginatepolluteRivers generally (a) ___ from a mountain or a lake. They (b) ___ very much important for our existence and economy. But unfortunately we are (c) ___ our rivers by throwing industrial and domestic wastes. Most of the industries (d) ___ waste treatment plants. These kinds of industries are (e) ___ liquid wastes and continuously ( f ) ___ the water. Our unconscious people also (g) ___ different kinds of waste materials into rivers. So, to keep the existence of fishes and other species (h) ___ in the water is impossible. It is high time the government and the people (i) ___ together to save the rivers. Otherwise a happy, prosperous and pollution free environment can't be ( j ) ___ for the next generation.

Question

**4.**

Complete the following text with right forms of the verbs given in the box.throwkillworkhavereleasebeensureliveoriginatepolluteRivers generally (a) ___ from a mountain or a lake. They (b) ___ very much important for our existence and economy. But unfortunately we are (c) ___ our rivers by throwing industrial and domestic wastes. Most of the industries (d) ___ waste treatment plants. These kinds of industries are (e) ___ liquid wastes and continuously ( f ) ___ the water. Our unconscious people also (g) ___ different kinds of waste materials into rivers. So, to keep the existence of fishes and other species (h) ___ in the water is impossible. It is high time the government and the people (i) ___ together to save the rivers. Otherwise a happy, prosperous and pollution free environment can't be ( j ) ___ for the next generation.

Accepted Answer

(a) originate (b) are (c) killing (d) do not have (e) releasing (f) polluting (g) throw (h) living (i) work (j) ensured

**Explanation:** (a) Plural subject "Rivers" with present simple: originate. (b) "They are very much important": plural form of be. (c) "we are + -ing": killing our rivers. (d) The negative idea (industries do not treat waste) needs "do not have". (e) "are + -ing": releasing liquid wastes. (f) "continuously polluting": present continuous. (g) Present simple, plural subject "people": throw. (h) "species living in the water": present participle. (i) After "It is high time", the past or base form is used: work together. (j) "can't be + past participle": ensured (from "sure").

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