must,shall and let's These sentences are exercises about use of must,shall and let's 1. I’m sorry,I can’t help you now. I must study geography. 2. That film is very interesting. You must see it! 3. It’s late. We must go at home. 4. You mustn’t walk on the grass. 5. In Great Britain you must drive on the left 6. Students musn’t sleep in class or write on the walls 7. The cat doesn’t want eat. It must be ill 8. The Sullivan aren’t at home. They must be in holiday 9. These jeans aren’t very good. They can’t be very expensive 10. That skirt is very cool mbut it must be very expensive 11. What shall we do this evening? Let’s go to the cinema. No,I don’t want go to the cinema. Let’s go to the theatre 12. What shall we buy Mark to his birthday? Let’s buy him a clock! No,not a clock. What about buying him a CD? 13. Shall I clean the kitchen? Thanks,it’s very kind of you 14. Why shall organize a party? Good idea. Who we invite? 15. I’m ungry. Why not go in a snack bar?