I. Change these sentences into the passive voice: 1. You mustn’t use the machine for over 12 hours a day. 2. Nam can repair his bicycle. 3. Mary helps her grandmother every weekend. 4. The workers will build many new houses in that area next year. 5. The mechanic checks the car engines every week 6. We clean the kitchen every day. 7. People grow rice in these fields. 8. They send the goods to Vung Tau by coach. 9. Mai irons her clothes every evening. 10. Linda types the reports in the this office. II. Write the sentences with the passive form of the verb: 1. His car/ wash/ every week. 2. Computers/ use/ so often/ in schools/ today. 3. Rice / export/ to many countries/ world. 4. An art exhibition/ will/ organize/ their school/ next month. 5. The bill/ must/ pay/ before the first of the month.