Low energy light bulbs should be used to_electricity

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6. Low energy light bulbs should be used to
_electricity.
A. convert
B. save
C. spend
D. buy
7. It is a good idea to use
A. private cars B. public transport C. cars
8. "Why is it called a
quickly."
when travelling long distances.
D. taxis
source?" - "Because it can be replaced easily and
A. renewable B. non-renewable
C. effective
D. specific
9. We must
the amount of water our family use every day
A. lessen
В.
narrow
C. lower
D. reduce
10. Wave energy is a source of
energy.
B. environmentally friendliness
D. environmentally friendly
A. environmental friendly
C. environment friendly