[ Modal Verbs of Obligation ]
Students _____ listen to the teacher or they won’t understand.
A. mustn’t
B. have to
C. don’t have to
Select your answer:

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X : Why didn’t you come to school yesterday?
Y: … I missed the school bus.
A. I got up so late that
B. I got up such late that
C. I got up so late but
D. I got up so late because
E. I got up very late that
