The ball was probably invented because （）
A. throwing stones often caused injuries
B. throwing stones was not fun
C. games with stones did not have rules
D. rocks were too heavy to throw
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.
The fate of the accused__________(取决于陪审团的决定)．
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