#职称英语综合类完形填空练习题10(2) 搜索结果
PASSAGE21TheGreatestMysteryofWhalesThewhaleisamammal-warm-blooded,air-breathing,givingbirthtoitsyoungalive,suckingthem-and,likeallmammals,originatedonland.Therearemanysignsofthis.__1__frontflippe
