V. Choose A, B, C or D for each gap in the following sentences. 11. They can be used to create energy, ______ electricity, or drive big machinery. A. turn B. generate C. drive D. heat 12. Minh Duc often goes to school ______ foot. A. on B. in C. by D. from 13. Good ______ helps people to stay healthy, and to live longer. A. disease B. dense C. space D. healthcare 14. In most big cities there are many wealthy people, but ______ is still a problem. A healthcare B. poverty C. clean water D. disease 15. ______ are non-renewable energy sources. A. Hydro B. Wind C. Fossil fuels D. Solar 16. It usually happens in February, and South American people ______ it in different ways. A. celebrate B. celebrates C. celebration D.celebratory 17. At this time next week, my dad ______ new glass in the windows to stop heat escaping A. will install B. will being install C. will be installing D. install 18. In the countryside, plants ______ to produce heat. A. will be burnt B. will burn C. burnt D. will be burning 19. ______ careful preparation, they had a lot of difficulties in making the film. A. Although B. Despite of C. In spite of D. However 20. Big cities suffer______ pollution than the countryside. A. many B. more C. less D. little 21. The lives of people in overcrowded cities are getting more difficult, ______? A. are they B. is they C. aren't they D. isn’t they 22. How about cycling to school with me tomorrow? A. Great idea! B. Thank! C. Oh no! D. That’s shocking! 23. They have invented a flying car. A. That’s awful! B. Oh dear! C. How terrible! D. Wow!