[ Grammar ]
The atmosphere is getting more………because there is more smoke from factories and motor engines.
A. polllute
B. polluting
C. polluted
D. pollution

Random Topics:
Grammar - either...or, neither...norPassivisationRelative Pronouns and AdverbsPerfect TensesComparativesComparatives and Past Perfect TenseGerunds and InfinitivesGrammar & TensesModals of ObligationVerb + Infinitive or GerundOther quiz:
Grammar › ViewI recommend you_____your homework before the picnic tomorrow
A. finishing
B. to finish
C. finish
D. finished
Grammar › View
Is _____ your mother?
A. this
B. these
Tenses › ViewJogging is a very good exercise.
A. Present Simple Tense
B. Present Continuous Tense
C. Simple Past Tense
D. Past Continuous Tense
Vocabulary › View
Horrible; shocking
A. Ghastly
B. Petulance
C. Verandah
D. Accomplice
