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UNIT 7I. CHOOSE THE CORRECT WORD
UNIT 7I. CHOOSE THE CORRECT WORD
UNIT 7 TIENG ANH LOP 9
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7. In order to save electricity, an ordinary 100-walt bulb can be replaced by ... (a light / an energy-saving bulb / an energying-save bulb / a saving-energy bulb)
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7.
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UNIT 7 TIENG ANH LOP 9