[ Vocabulary ]
You can ____________ to the discussion by voicing you thoughts on the subject.
A. Reflect
B. Notable
C. Contribute
D. Memorize

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Have to/Has toAdverbial ClausePast ModalsTOEFL Adjective and AdverbSecond Type ConditionalGerunds, Infinitives and Modals of PossibilityTypes of PhrasesGerunds and TensesMiscellaneous Grammar UsagesGrammar : Must (Necessity)Other quiz:
Conjunctions › View… I have no money, I can’t go to the play.
A. Yet
B. Since
C. Nor
D. And
Vocabulary › View
Unconventional means something is …
A. unusual
B. unique
C. useless