Grammar Quiz

[ Grammar ]

Air pollution levels ___ dramatically since governments worldwide introduced stricter environmental laws.

A. decreased

B. is decreasing

C. decreases

D. have decreased

Select your answer:
A  B  C  D  E 


Random Topics:

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 Types

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