We know what ............... the river to get polluted. ...

[ Grammar ]

We know what …………… the river to get polluted.

A. wastes

B. makes

C. causes

D. puts in

Select your answer:
A B C D E

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Conjunctions & Interjections Present Simple Progressive Adjectives & Adverbs Grammar, adverbs of frequency placement Noun Verb Agreement Tenses - Pasive Voice Present Continuous for Future Vocabulary and Modal Verbs Complex Prepositions Past Perfect Tenses

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