1.His had softened during the many generations since the day his last wild ancestor was tamed by a cave-dweller or riverman。
2.This was a greatrelief, and Buck caused even the weazened face of Perrault to twist itself into a grin one morning,
when Francois forgot the moccasins and Buck lay on his back, his four feet waving appealingly in the air, and refused to budge without them.
3.Buck was the exception. He alone endured and prospered, matching the husky in strength, savagery, andcunning.
Then he was a masterful dog, and what made him dangerous was the fact that the club of the man in the red sweater had knocked all blind pluck and rashness out of his desirefor mastery.