**Choose the best option:
1.A lot of dancers go to Rio de Janeiro to ______ the Rio Carnival.
A.join
B. perform
C. attend
D.appear
2. Everybody attends the festival _____ fun.
A.with
B. for
C. in
D. of
3. On Thanksgiving, families and friends _____ to have a feast.
A.meet
B. arrive
C. gather
D. appear
4. Mid-autumn festival is a famous _____ festival in some Asian countries.
A.religious
B. seasonal
C. arts
D. superstitious
5. The Glastonbury Festival is afamous performing ____ festival in England. There people enjoy contemporary music, dance, comedy, theatre ans other arts.
A.religious
B. seasonal
C. arts
D. superstitious
6. ______ do people celebrate the festival?
- They celebrate it with street fair and live music.
A.when
B. where
C. what
D. how
7. ______ does the festival take place?
- Every year.
A.when
B. how long
C. how often
D. how
8. The _____ of the Rio Carnival is the Samba Parade.
A.highlight
B. dance
C. performance
D. music
9. _______ energy sources like coal, natural gas, and oil produce a lot of carbon dioxide.
A.renewable
B. non-renewable
C. dangerous
D. limited
10. We will use ______ energy sources like wind and solar energy to solve the problem of pollution.
A.renewable
B. non-renewable
C. plentiful
D. limited
11. Hydro power is _____ because dams cannot be built in certain areas.
A.abundant
B. cheap
C. limited
D. clean
12. Nuclear energy is renewable and clean. But it is expensive and ________.
A.polluting
B. safe
C. dangerous
D. available
 
13. Coal is _____ but it will be replaced by another renewable source.
A.plentiful
B. limited
C. clean
D. convenient
14. The wind and the sun are called _______ sources of energy because they can create a lot of energy for us.
A.alternative
B. available
C. replace
D. clean
15. Fossil fuels are convenient. However, they are ______ to the environment.
A.polluting
B. exhaustible
C. harmful
D. unlimited