6. Solar and wind . .instead of fossil fuels within 20 years?

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6. Solar and wind . .instead of fossil fuels within 20 years?
A. are used
B. will be usedC. will use
D. will be using
7. Humankind's future. .bright if they can utilize renewable energy in the future.
C. will be
A. is
B. was
D. won't be
8. Where . .in ten years?
C. will you be lived
9. We . .able to create a future that's free of carbon pollution by using renewable energy sources.
C. will be being
A. do you live
B. are you living
D. will you be living
A. will be
B. won't be
D. will have been
10. Solar panels
...outdoors to capture sunlight and transform it into electricity.
.....
A. will place B. will be placing
C. will be placed
D. will have placed