Bộ 10 đề ôn thi học sinh giỏi Tiếng anh lớp 9 có lời giải chi tiết (Đề 10)

As people use a lot of wood-pulp, many trees are cut down.

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As people use a lot of wood-pulp, many trees are cut down.

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Giải thích

The more wood-pulp is used, the more trees are cut down