Grammar Quiz
[ Preposition & Gerund ]

Brian really has to work on _______ his vocabulary.

A. improve

B. improved

C. improving

D. improves

Select your answer:
A  B  C  D  E 


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Commas and Subordinating ConjunctionsPrepositions of Place & TimePronouns, Verb, ConjunctionGrammar Like & Linking VerbPresent Simple & Present Progressive TenseConditional Sentence 0, 1Sentence Structure and ConjunctionsSuffixes (ing-ed) SentencesInfinitive and GerundsGerund, Infinitive & Modals

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sellers or merchants

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