[ Modal Verbs - Obligation ]
You …………. speak to the driver when the bus is moving. It’s dangerous.
A. must
B. mustn’t
C. don’t have to

Random Topics:
Modals of AdviceGrammar: Imperative and Exclamatory SentencesTOEICAuxiliary VerbsAdverbs of Time and PlacePossessive Adjectives VS Possessive PronounsHelpful Phrases Time PhrasesWho or WhomSimiles, Metaphors, Personification and HyperboleOther quiz:
PRESENT TENSE › ViewMy father and I_________________________ (go) fishing every weekend.
A. goes
B. go
Grammar › View
Identify the DECLARATIVE sentence.
A. Where is my purse?
B. Please stop shouting.
C. I love grammar!
D. I came here to drink coffee and study grammar, and I’m all out of coffee.