单项选择题

According to the passage, trees were initially needed by the Nebraskan settlers for ______.

A．shade
B．the prevention of soil erosion
C．the creation of parks
D．construction
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单项选择题
According to the passage, which of the following happened on April 10, 1872
A．A great many new trees were planted.
B．J. Sterling Morton was born.
C．The Nebraska state government donated trees.
D．A million prizes were awarde
单项选择题
The word literature in the last sentence refers to ______.
A．stories, poems, plays, etc
B．written works on a particular subject
C．any printed material
D．the modern literature of America
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