单项选择题

Which of the following is NOT a cause of the problem under discussion

A．Over-grazing.
B．Radioactive contamination.
C．Poaching.
D．Tramplin
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单项选择题
Ernest Hemingway's first book was published in______.
A．1923
B．1924
C．1926
D．1929
单项选择题
Which of the following books won Hemingway a Pulitzer Prize
A．The Old Man and the Sea.
B．The Green Hills of Africa.
C．A Farewell to Arms.
D．For Whom the Bell Tolls.
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