单项选择题

What sense is weak or nonexistent among birds

A．Hearing.
B．Sight.
C．Smell.
D．Taste.
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单项选择题
From most homes you can escape a fire through the ______.
A．attic
B．garage
C．windows
D．balcony
单项选择题
The last paragraph is about ______.
A．the senses of birds
B．the classification of birds
C．the evolution of birds
D．the characteristic of birds
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