[ Grammar ]
Only when ______ may vehicles cross the train tracks.
A. is the green light on
B. did the green light be on
C. on is the green light
D. the green light is on

Random Topics:
Adjectives with PrepositionComparison Degree & GerundsSpeculation with Modal VerbsGerunds, Infinitives and ParticiplesDependent PrepositionsModifiersClauses and ConjunctionUnscramble SentenceDo / Have / Can - Basic QuestionsPresent Progressive or Present SimpleOther quiz:
Grammar › ViewLola’s diary is _____ with a strong metal clasp to protect her privacy.
A. fast
B. fasten
C. fastens
D. fastened
Correlative Conjunctions › View
What is the primary purpose of using correlative conjunctions in writing?
A. To create complex sentences
B. To introduce dependent clauses
C. To emphasize certain ideas
D. To establish contrasts
Grammar › ViewTake care of our environment, _______ that the future generations may also enjoy it.
A. So
B. And
C. But
D. Yet
Modals Verbs › View
We______ have been crazy.
A. Must
B. Will
C. Should
D. Could
