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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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参考解析：
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举一反三
【单选题】The body of a praying mantis can look just like___.
A.
a predator
B.
a flower
C.
another insect
【单选题】Survival of the fittest is a synonym for (adaptation to the environment / natural selection / useful traits).
A.
adaptation to the environment
B.
natural selection
C.
useful traits
【单选题】When it hides on the ocean floor, only the___ of the flounder can be seen.
A.
fin
B.
tail
C.
eyes