Đề thi học kì 2 THCS Nguyễn Công Trứ môn Anh lớp 7 năm 2020
3. Biogas is mainly used for ___________.
A.cooking and heating
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B. heating anh ironing
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C. cooking and cleaning
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D. cooking and baking
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4. Biogas is made from ________ and animal manure.
A. waste
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B. food waste
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C. plant waste
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D. palnt
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Theo TTHN