Bộ 5 đề thi cuối kì 2 Tiếng Anh 9 Global Success có đáp án - Đề 1

She also advices that if you use energy- (3) _______ light bulbs and turn off the lights when leaving a room, you can conserve electricity.

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She also advices that if you use energy- (3) _______ light bulbs and turn off the lights when leaving a room, you can conserve electricity.

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saving