Topics: 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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Action, Helping & Linking Verbs1st ConditionalVocabulary and Definitionsduring, for, whileFirst Conditional & Future TensesGrammar and UsageCommon & Proper NounsPhrasal Verbs and GrammarPassive and Active VoiceModal Verbs for SpeculationOther quiz:
Vocabulary › ViewThe person telling the story in the book.
A. Celebration
B. Narrator
C. Curiosity
D. Sanctuary
Tenses › View
Water ___ about 50 to 55 percent of total body weight
A. make up
B. makes up
C. making up
D. made up