第31题: [单项选择]Consider the universal cannibalism of the sea, all of whose creatures ______ one another. A. hide from B. ferret out C. prey on D. compete against 参考答案:C 答案解析:(prey on捕食)。句意为:试想海里普遍的同类相食行为,海中所有的动物都以彼此为捕食对象。A.hide from躲避;B.ferret out带雪貂去狩猎;D.compete against与……