Write the sentences in passive form: Modal verbs. 1. You can’t wash this dress. .................................................................................................................................... 2. You should open the wine about 3 hours before you use it. .................................................................................................................................... 3. Members may keep books for 3 weeks. .................................................................................................................................... 4. Passengers shouldn’t throw away their tickets as inspectors may check them during the journey. .................................................................................................................................... 5. They ought to have reported the accident to the police. .................................................................................................................................... 6. Visitors must leave umbrellas and sticks in the cloakroom. .................................................................................................................................... 7. You should have taken those books back to the library. .................................................................................................................................... 8. We cannot exchange the goods which customers have bought during the sale. .................................................................................................................................... 9. You mustn’t move this man; he’s too ill. .................................................................................................................................... 10. When they have widened this street, the roar of the traffic will keep residents awake all night. ....................................................................................................................................