V. T, T, F, T, F 
VI. 1. Segway is. 
2. Maybe because it's too expensive. 
3. The monowheel.
4. The Segway is. 
VII. 1. Human will use the sun as the biggest energy source for the future. 
2. Mr. Tan will be working in a hospital this time next year. 
3. My school will be organizing a festival next week. 
4. The students will be learning English at this time tomorrow. 
VIII. 1. to reduce pollution in the city will be found by scientists.
2. will be used more efficiently for our future. 
3. will be minimized to save our energy. 
4. will be made by governments to reduce industrial pollution. 
5. will be offered by wind power next century. 
(bị động thì Tương lai đơn: will be + PII, và các modal verbs khác cũng thế!)