Bộ câu hỏi: Từ vựng multiple choice bám sát SGK (Buổi 2) (Có đáp án)
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Air pollution can be caused by the ______ of fossil fuels such as coal.

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Air pollution can be caused by the ______ of fossil fuels such as coal.

combustion

clutter

resources

particle

Giải thích

Chọn A