Chọn đáp án đúng và giải thích

A. our
29. La Tomatina is a
A. year
B. hers
B. seasonal
C. her
D. their
festival to celebrate the tomato harvest.
C. season
30. The wind, the sun, and the wave are some types of
A. changeable
B. alternative
31. Alternative sources of energy
A. is
C. cheap
D. annually
sources of energy.
D. costly
developed in the near future.
C. has been
32. Fossil fuels are very common in our society but they
A. renew
33. A hydro power station
C. waste
D. will be
the environment.
D. pollute
in the North of the country next year.
C. will be built
D. has been built
B. was
B. provide
A. was built
B. were built
34. We should put on
our roof for the heating and hot water.
A. solar energy
B. equipment
C. cracks
D. solar panels
35. Low energy light bulbs should be used to
A. spend
electricity.
B. buy
C. convert
D. save
IV Supply