单项选择题

A．increase
B．add
C．solve
D．intensify
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单项选择题
A．forB．byC．toD．as
A．for
B．by
C．to
D．as
单项选择题
What is the main reason of the reduction of the grizzly bears’ number
A．Lacking food.
B．Forest deceasing.
C．The coyote existing.
D．Not clear yet.
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