Weareusingupournaturalresourcestooquickly
单项选择题 We are using up our natural resources too quickly and at the same time we are（） our environment with dangerous chemicals.
A.protecting
B.saving
C.polluting
D.fighting
正确答案：C
答案解析:pollution意为“污染”。
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相关知识：第二章、语法与词汇
