[ Grammar ]
(Tom / participate) _________________________ in “Green Summer” program before?
A. Has Tom participate
B. Tom has participated
C. Did Tom participate
D. Has Tom participated

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Grammar - FragmentsModals for ObligationLinking Words and PhrasesNounVerb-ing and InfinitiveDirect and Indirect SpeechDescriptionsInfinitiveHelpful Phrases Present, Past, Present Perfect and ComparativeOther quiz:
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A. play
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The school ____ art classes for decades, and they regularly ____ student exhibitions.
A. was offering / held
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That pencil is not _________, it’s mine.
A. You
B. Your
C. Yours
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