1.By the middle of the 21st century, people in developing countries ___ more renewable energy.
A. uses B. will be using C. used D. have used
2. The wind, the sun and the wave are some types of ___ sources of energy.
A. changable
B. alternative
C. cheap
D. costly
3. Alternative soures of energy ___ developed in the near future.
A. is
B. was
C. has been
D. will be
4. Fossil fuels are very common in our society but they ___ the environment.
A. renew
B. provide
C. waste
D. pollute
5. "Why is it called a ___ source?" - "because it can be replace easily and quickly"
A. effective
B. specific
C. renewable
D. non-renewable
6. Hydro power is ___ because dams connot be built in certain areas.
A. limited
B. unlimited
C. abundant
D. enough
7. At this time next week, we ___ a wind turbine in our farden.
A install
B. installed
C. will installed
D, will be installed
8. Biogas is ___ and cheap for cooking and heating
A. plenty
B. abundant
C, serious
D. expensive
9. 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
10. We should put ___ on our roof for the heating and hot water.
A. solar energy
B. equipment
C. cracks
D. solar panels
11. Remember to ___ the lights before going to bed.
A turn
B, turn off
C, turn on
D, stop

12. it is a good idea to use ___ when travelling long distances.

A cars

B taxis

C. private cars

D. public trans prot

13. What should we do to ___ electricity?

A. cut

b. take

c,save

d, waste

14. we shout use ___ light bulbs in our homes

a, low energy

B. little energy

c, a nit energy

d, efficient

 Remember to __________ the lights before going to bed.

A.   turn                 B.  turn off             C.   turn on           D.  stop

12.  It is a good idea to use __________ when travelling long distances.

A.   cars                  B.taxis                  C.   private cars    D.  public transport

13.  What should we do to __________ electricity?

A.   cut                    B.  take                 C.   save                D.  waste

14.  We shout use __________ light bulbs in our homes.

A.   low energy      B.little energy        C.   a bit energy    D.  efficient

15.  In my opinion, nuclear power is not only expensive but also _______  to

our environment.

A.   danger              B.dangerous        C.   risk                  D.  disaster

16.  Someone’s carbon _______ is a measurement of the amount of carbon

dioxide that their activities produce.

A.   effect              B.  amount            C.   footprint         D.  energy

17.  Several governments try to __________ the use of fossil fuels.

A.   reduce              B.  increase          C.   waste              D.  save

18.  We are looking for cheap, clean and _________ sources of energy.

A.   effective          B.efficient             C.   serious             D.  dangerous

19.    _______ source of energy is the source that can’t be replaced after use.

A.   Renewable        B.  Natural             C.Effective           D.  Non-renewable

20.  Wave energy is a source of _________ energy.

A. environment friendly                     C.environmentally friendly

B. environmental friendly                  D.environmentally friendliness

21. B

22. B

23. A

24. D