[ Grammar ]
Air pollution levels ___ dramatically since governments worldwide introduced stricter environmental laws.
A. decreased
B. is decreasing
C. decreases
D. have decreased

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Modals: Possibility, Necessity, ExpectationCoordinating and Subordinating ConjunctionsGrammar PhrasesModal Verbs and PermissionModal and Phrasal VerbsGiving and Asking for AbilityAdjectives and PrepositionsTransitional Phrases and ConjunctionsGrammar: Defining Relative ClausesConditional TypesOther quiz:
Articles › ViewHe is looking for a new job.
A. TRUE
B. FALSE
Prepositions › View
She is laboring _______ her Mathematics.
A. At
B. With
C. For
D. Below
What ————- you —————–of this new TV?
A. are /thinking
B. is /thinking
C. were /thinking
D. do /think
Grammar › View
When did you ___________ your husband?
A. know
B. meet
