Topics: Subject and Verb Agreement
As the pistons ________ forced up and down, they rotate the crankshaft.
A. is
B. are
Select your answer:

Random Topics:
Present Simple and Past ContinuousA/AnPresent Tense vs Present ContinuousPhrases and TensesFirst Conditional & Future TensesNo Excuse Words / Conjunction SOTransitive or Intransitive VerbsSo / Neither / Either / TooAdjectives with PrepositionModal Verbs of Certainty and PossibilityOther quiz:
Modal Verbs › ViewHe ___ be late for the meeting.
A. might
B. must
C. should
D. can
Grammar › View
If you give your details to our secretary, we will contact you when we have a vacancy.
A. Simple
B. Compound
C. Complex
D. Compound-complex
