Topics: Subject and Verb Agreement
The engine ______ by igniting mixture of fuel and air causing combustion.
A. is
B. are
Select your answer:

Random Topics:
Modals of PredictionPast Tense (Regular and Irregular)Phrase vs ClausePersonal PronounsModal Verbs & Perfect InfinitiveApologizingFuture FormsSubjunctivesModal PerfectGrammar PhrasesOther quiz:
Prepositions › ViewHe was _______hospital for a few days.
A. On
B. In
C. Over
D. Below
Present Perfect Continuous Tense › View
We …… so hard, so now we are going to have a rest. (work)
A. have not been working
B. have been working
C. are working
D. are not working
