[ Modals for Obligation ]
Johnny! You _______ play with sharp knives. Put that knives down immediately!
A. don’t have to
B. have to
C. mustn’t
D. must
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Perfect Tenses › ViewWe had seen the movie twice before today.
A. Present Perfect
B. Past Perfect
C. Future Perfect
Modal Verbs › View
You look tired, I think you … take a break
A. should
B. shouldn’t
C. have
D. don’t have