Bộ 5 đề thi giữa kì 2 Tiếng Anh 8 Global Success có đáp án (Đề 4)

Making recycled paper into new paper products saves energy and water (4) ___________ the number of energy-intensive steps and processes that use water are reduced.

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Making recycled paper into new paper products saves energy and water (4) ___________ the number of energy-intensive steps and processes that use water are reduced.

although

so

but

because

Giải thích

D