Together ______ of Alaska fur seals swim d

答案：

参考答案：C

解析：[分析] 细节题型。 [注意本题容易选错]从文章Another migrating mammal is the Alaska fur seal These seals breed only in the Pribilot Islands in the Bering Sea. The young are born in June and by September are strong enough to go with their mothers on a journey of over 3,000 miles．Together they swim down the Pacific Coast of North America．The females and young travel as far as southern California．The males do not journey so far，中的划线部分可知，The females and young Alaska fur seal会从the Bering Sea(白令海——北太平洋的一部分)swim down the Pacific Coast of North America直到 southern California；而 The males也会从白令海南下(因为These seals breed only in the Pribilot Islands in the Bering Sea．)，只不过他们没有the females and young走的远罢了。因此选项C为答案。