[ Subject and Verb Agreement ]
With the intake stroke, the piston is moving downward. That _______ the gasoline and air to move into the engine as the arrow shows.
A. allow
B. allows

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Have to / Do not have toAdjectives & AdverbsConjunction: Because and SoQuantifiers & Modal VerbsConditional Sentence Type 2 and Type 3so vs suchCorrelative Conjunction & Complex SentencesGrammar (Possessive Pronouns)Prepositions of Time & PlaceFuture Perfect vs Future ContinuousOther quiz:
Articles and Pronouns › View________ moon is ________ satellite of __________ earth while sun is ______ star.
A. a, an, the, the
B. a, a , the, the
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It tell us that an action was in progress, but not when it was finished.
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A. prècis
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Tenses › View
They ____ play football tomorrow afternoon.
A. is
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