---Will you stay for lunch?---Sorry, I _______ . My brother is coming to see me.
A. mustn't
B. can't
C. needn't
D. won't
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We have ordered too much food. I _______ eat any more.
A. can't
B. mustn't
C. needn't
D. shouldn't
All passengers ________ go through safety check before they take a plane.
A. can
B. may
C. must
D. could
---______ I wear a tie to jenny's birthday party.---No, you needn’t. But do remember to bring her a present.
A. Must
B. Should
C. Need
D. Can
---Life is becoming convenient with the internet.---That's true. Almost everything _______ be done online.
A. must
B. could
C. should
D. can't