2. 外语
  3. Why are sled dogs said to be physical wonders? The idea of using dogs to pull sleds began ______.

Why are sled dogs said to be physical wonders? The idea of using dogs to pull sleds began ______.

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问题 Why are sled dogs said to be physical wonders?
The idea of using dogs to pull sleds began ______.
选项 A、some 35 000 years ago
B、1 000 years ago
C、before 1 000 B.C.
D、before 1908
答案C
解析 由题干中the idea可定位到第二段第三句There’s no saying exactly when someone thought to have dogs pull sleds，but it was well before 1000 B．C.根据第二段第三句可知，这个想法应该在公元前1000年之前。因此C)为答案。
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