单项选择题

What does "this information" (in paragraph 7) refer to

A．Soft tissues.
B．Bone.
C．Markings.
D．Nose.
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The word passage (Line 2, Para. 8) means ______.
A．gate
B．channel
C．cross
D．paragraph
单项选择题
One advantage with Nostrils high on the head is to ______.
A．use sense of smell more efficiently
B．help them move fast and alert
C．enable them to find more food
D．help them live under water more easily
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