1.Oil,coal,and natural gas are .........................
A.Solar system 
B.nuclear power
C.hydropower
D.fossil fuels
2.What should we do to ................... electricity
A.cut
B.take 
C.save 
D.waste
3..........................source of energy is the source that can't be replaces after use.
A.Renewable
B.Natural
C.Effective
D.Non-renewable
4.We are looking for cheap,clean and.......................... sources of energy.
A.effective 
B.efficient
C.serious
D.dangerous
5.We should put ....................... on our roof for the heating and hot water
A.solar energy 
B.equipment
C.cracks
D.solar panels
6.We should use........................light bulbs in our house
A.low energy
B.little energy
C.a bit energy
D.efficient
7.In my opinion,nuclear power is not only expensive but also.....................to our enviroment
A.danger
B.dangerous
C.risk
D.disaster
8.Several governments try to ................................ the use of fossil fuels.
A.reduce
B.increase
C.waste
D.save
9.It is a good idea to use...........................when travelling long distances.
A.cars
B.taxis
C.private cars
D.publix transport
10.Wave energy is a source of...............................energy
A.environment friendly
B.environmentally friendly
C.enviromental friendly
D.environmentally friendliness
11.Remember to..........................the lights before going to bed.
A.turn
B.turn off
C.turn on
D.stop
12.A hydropower station...............in the North of the country next year.
A.was built
B.were built
C.will be built
D.has been built
13.Biogas is...........................and cheap for cooking and heating
A.plenty
B.abundant
C.serious 
D.expensive
14.At this time next week,we...............a wind turbine in our garden
A.install
B.installed
C.will installed
D.wil be installing