单项选择题

A．Pollution of the environment.
B．Over-killing by hunters.
C．Destruction of their natural homes.
D．A new generation of pest killers.
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单项选择题
A．Saws, choppers, axes, tongs, hooks.B．Axes, saws, choppers, tongs, hooks.C．Choppers, axes, saws, hooks, tongs.D．Axes, saws, choppers, hooks, tongs.
A．Saws, choppers, axes, tongs, hooks.
B．Axes, saws, choppers, tongs, hooks.
C．Choppers, axes, saws, hooks, tongs.
D．Axes, saws, choppers, hooks, tongs.
单项选择题
A．He may see Alan in Italy.B．He was looking for Alan in the library.C．He’’s not sure which way to go.D．He may have made a mistake.
A．He may see Alan in Italy.
B．He was looking for Alan in the library.
C．He’’s not sure which way to go.
D．He may have made a mistake.
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