单项选择题

Louis Hennepin was ______.

A．a clergyman
B．an imaginative person
C．the first person who discovered Niagara Falls
D．the author of two widely-read accounts which described Niagara Falls objectively

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热门试题

单项选择题

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 were not aware of the significance of nature study
D．they had no idea of how to make good use of raw materials

单项选择题

It can be inferred from the third paragraph that earlier generations didn't realize ______.

A．the interdependence of water, soil, and living things
B．the importance of the proper use of land
C．the harmfulness of soil destruction and river floods
D．the value of the beauty of nature