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
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
A typical B organic C reliant D dependent
A typical
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
1_____energy were difficult to harness, we would be able to produce lots of clean energy. A If B As long as C Unless D On condition that
C. Unless
(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
The chemical factories produced _____ that threatened the local people’s health. A machines B materials C metals D pollutants
D pollutants
A sustainable B predictable C affordable D beneficial
D beneficial
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
(22)_____make a change together for a healthier, more sustainable city. A Why don’t B How about C Shall we D Let’s
D. Let’s
A pollute B reduce C commute D excuse
A. pollute
A investment B energy C depletion D benefit
C. depletion
Renewable energy sources can’t be ______in the natural world. A polluted B depleted C predictable D impactful
B. depleted
A viable B impactful C permanent D usable
B. impactful
A locate B install C value D exist
C. value
(20) _____ vehicles severely cause air pollution. A Energy-saving B Fuel-efficient C Fossil-powered D Eco-friendly
C Fossil-powered
______ items are originally thought to be useful, but they turn out to be an environmental problem. A Dispose B Disposable C Disposing D Disposal
B Disposable
A mode B town C home D growth
B. town
Did you know that using LED lightbulbs instead of conventional ones could (23) _______ reduce your electricity bill? A. negatively B. significantly C. impossibly D. ineffectively
B. significantly
We can____the power of the wind to generate electricity. A save B harness C manage D conserve
B. harness
If you could charge your car with the sunlight, (20) ______ you? A. will B. can’t C. won’t D. would
D. would
If I _____ that plastic was bad for the environment, I would have used reusable bags for shopping. A had known B knew C will know D know
A had known
If we (21) ___to eco-friendly options like electric vehicles, bicycles or public transport, our city will have cleaner air and a brighter future. A switch B switched C had switched D would switch
A switch
A consistent B consuming C depleted D minimal
D minimal