1. You mustn’t use that machine after 5.30 p.m. 2. The principal will hold an English-speaking contest in Quang Trung School next month. 3. Janet gave Mary and her little cousin two teddy bears on their birthday by coincidence. 4. Pollution and chemicals from the factories have been polluting the environment. 5. Mr. Jones has just sold the old house at the end of the road. 6. They are building a ring road in the other side of the city. 7. The city dwellers mustn’t throw rubbish very carelessly. 8. You should keep these flowers in a warm sunny place. 9. The committee will have to change the day of the meeting again. 10. Many people speak English all over the world. 11. A businessman will buy many houses in that area next year. 12. The reporter is interviewing the eight-form students at the moment. 13. They have kept these boxes of chocolates for three weeks. 14. Our teacher corrects our homework on the blackboard every day. 15. The workers will build a supermarket beside the school next year.

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