A viable B impactful C permanent D usable
B. impactful
A pollute B reduce C commute D excuse
A. pollute
A locate B install C value D exist
C. value
A consistent B consuming C depleted D minimal
D minimal
Renewable energy sources can’t be ______in the natural world. A polluted B depleted C predictable D impactful
B. depleted
16 Some types of green energy sources are very difficult to be in some nations. A harnessed B impacted C reduced D contributed
A harnessed
If tidal power ___ energy continuously, it wouldn’t be regarded as a sustainable energy source. A doesn’t produce B hasn’t produced C didn’t produce D hadn’t produced
C. didn’t produce
Unless we _____ a suitable location for wind energy, we won’t be able to build wind turbines. A find B don’t find C found D didn’t find
A. find
19 If I were you, I ______ down on my daily use of fossil fuels from now on. A will cut B would cut C would have cut D could have cut
B. would cut
If you could charge your car with the sunlight, (20) ______ you? A. will B. can’t C. won’t D. would
D. would
The Sun Travel’s revolutionary solar panels (21)____the solar power, providing you with unlimited energy. A. produce B. maintain C. harness D. promote
C. harness
(22)_____ fuel-powered cars had never been invented, this is what we would be driving! A. If B. Unless C. When D. While
A. If
A investment B energy C depletion D benefit
C. depletion
A mode B town C home D growth
B. town
A typical B organic C reliant D dependent
A typical
A sustainable B predictable C affordable D beneficial
D beneficial
