If there is a mechanical problem, I suggest that you should _______ the manufacturer directly.
A. contact B. to contact C. contacting D. be contacted
A dripping faucet __________ 500 liters of water a month.
A. waste B. have waste C. can waste D. will wastes
In order to save electricity, an ordinary 100-watt light bulb can be replaced by __________.
A. an energy-saving bulb B. a 100-watt light
C. an electric bulb D. a lamp
If you want to save money, you should __________ the amount of water your family uses.
A. increase B. reduce C. adapt D. repair
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Sinh Học lớp 12
