7. has been
8. was
9. haven't lived
10. will be living
11. to decide
VIII
1. Solar energy will be used by many countries in the world
2. How will you travel from one place to another ?
3. We will reduce the use of electricity to save our energy
IX
1. C
2. C
3. A
4. A
X
1. B
2. D
3. D
4. B
5. A
6. A
7. A
8. A
9. C
10. A
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