Trắc nghiệm ôn tập
The clearing of land for agriculture, industry, and other human activities have increased ____ of greenhouse gases.
Câu hỏi:
The clearing of land for agriculture, industry, and other human activities have increased ____ of greenhouse gases.
A.
concentrations
B.
attention
C.
lots
D.
collections
Đáp án đúng: A
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