If I _______ leave work early because I don't feel ...

★ Modals of Obligation and Permission

If I _______ leave work early because I don’t feel well, I can do that without a problem.

A. allowed to

B. don’t have to

C. can’t

D. need to

E. supposed to

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(Notice on a train) Quiet carriage. Passengers _____ play music or talk on the phone in this part of the train.

A. can’t

B. must not

C. don’t have to