问题
选择题
The cause of the problem is that as we burn ________-coal, oil, and gas-we pump carbon dioxide into
the atmosphere. [ ]
A. fuels
B. articles
C. goods
D. products
答案
答案：A
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The cause of the problem is that as we burn ________-coal, oil, and gas-we pump carbon dioxide into
the atmosphere. [ ]
A. fuels
B. articles
C. goods
D. products
答案：A