Complete each sentence so that it contains might, might not, must, mustnt, cant or can. More than one answer may be possible. 1. Were not sure but we _________ go to Prague for Christmas this year. 2. Bill cooked the lunch, so you _________ expect anything special! 3. You really ________ start spending more time on your work. 4. Thats really stupid idea! You _______-be serious, surely! 5. You ________ realize it, but this is very important to me. 6. Tell Mike he _________ take my book if he needs it.