Factories allow these dangerous substances to pour into the rivers, ...

[ Grammar Clauses ]

Factories allow these dangerous substances to pour into the rivers, ___ their chimneys fill the atmosphere with poisonous fumes.

A. while

B. where

C. although

D. so that

Select your answer:

Random Topics:
Verbs Grammar ( going to)Verb Phrases Subjunctives Comparative and Superlative Adverbs Nouns Formation Compound Sentences Simple Past Tense and Past Perfect Tense Present Simple x Present Continuous

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