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【单选题】

The ptarmigan lives in Europe and___.

A.
North America
B.
Asia
C.
Africa
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【单选题】In the winter, the ptarmigan grows long white feathers on its___.
A.
head
B.
feet
C.
back
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【单选题】Camouflage is the___ protection for the ptarmigan in the Pacific Northwest.
A.
last
B.
best
C.
only
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【单选题】The moth lays eggs___ oak tree leaves.
A.
between two
B.
on the underside of
C.
on top of
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【单选题】The caterpillars mimic the___ of the oak tree flowers.
A.
movement
B.
scent
C.
color
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【单选题】The caterpillars use camouflage to avoid being eaten by___.
A.
snakes
B.
rats
C.
birds
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【单选题】The body of a praying mantis can look just like___.
A.
a predator
B.
a flower
C.
another insect
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【单选题】The___ is prey for the desert snake.
A.
lizard
B.
frog
C.
spider
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