Wild dogs are dangerous predators because they ______.
A. are very fierce
B. hunt in large packs
C. are very intelligent
D. have unusually large litters
正确答案：B
第一段单独一只野狗看起来没有危险但它们组合成一群时就完全是另一回事了他们是非常强悍的狩猎者
Wilddogsaredangerouspredatorsbecausethey______Aare
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