单项选择题

According to the passage, which of the following can be found in areas with quite different climatic conditions on Earth（）

A. Reef corals.
B. Penguins.
C. Bears.
D. Camels.

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单项选择题
22（）

A.With 
B.off 
C.of 
D.on
填空题
A.cook B.wood C.boot D.childhood
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