[ Subject and Verb Agreement ]
As the pistons ________ forced up and down, they rotate the crankshaft.
A. is
B. are
Select your answer:
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Tenses and PronounsGrammar - QuantiflierGrammar: was/werePresent Continuos TenseClauses and GerundsCoordinating ConjunctionsPrepotitionsPrepositionPresent Simple and Present ContinuousTenses of Verbs - UsageOther quiz:
Prepositions › ViewAre you ready _____ the history examination?
A. in
B. until
C. from
D. for
Grammar and Vocabulary › View
It is vital that you…… treat yourself well.
A. Should
B. Will
C. Would