[ Grammar ]
David _______ (improve) his tablet with a faster processor.
A. improves
B. improving
C. improved
D. improve

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Tenses StructureAdjective / Noun + to InfinitivePresent Perfect and Simple Past TenseSimple Present Continuous TenseWill and Will notSubject Verb Agreement and Verb TensesVerb Moods and Vague PronounsArticle the or zero article (-)Conjunctions and TransitionsSentence Structure and Grammar RulesOther quiz:
Grammar › ViewI haven’t tried Chinese food before.
I haven’t _______
A. neither
B. not
C. either
D. yet
Tenses › View
…………you come yesterday?
A. Do
B. Does
C. Did
D. Were
Grammar Rules › ViewChoose
We use the modal verb “must” to express…
A. obligation and necessity
B. strong recommendation
C. lack of necessity or obligation
D. prohibition
E. advice or an opinion
Grammar › View
My brother learns _______ chess
A. play
B. to play
C. playing
