单选题
According to the author, the greatest mistake of our forefathers was that______.
A、
they had no idea about scientific forestry
B、
they had little or no sense of environmental protection
C、
they did not know the importance of nature study
D、
they had no idea of how to make good use of raw materials
【正确答案】
B
【答案解析】
[解析] 第一段从第三句开始陈述我们的祖先不知道人口增长过快的危害，不知道自然财富会消耗完等事实，综合起来就是说明祖先基本没有环保意识。 A、C、D的陈述过于片面。
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