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can can’t should should should shouldn’t mustn’t must mustn’t mustn’t
1. You ______________ smoke in the library.
2. I think you ________________ take the train; it’s faster than the bus.
3. I’m sorry, you _________________ buy drinks after 11 o’clock.
4. Jan: We’re getting married.
Sam: Congratulations.
Jan: But you _______________ tell anyone, it’s a secret.
5. If you’re worried about your eyes perhaps you ________________ see a doctor.
6. I don’t think we ________________ leave him; it’s not fair.
7. You know, you really _______________ smoke so much it isn’t good for you.
8. Now, you ______________ be good while we’re away, do everything Grandma says.
9. These are my most precious possessions so you _______________ touch them, but you____________ look at them.