In(换成on) the afternoon of one Saturday in July ,a boy was being（being去掉） looking after his goats at the foot of a hill while suddenly (加some)black clouds began to gather .Then he decided to drive it(改成them) into a cave.When he got there ,he found that many wild goats had come yet(改already或去掉).He thought ,”I shall catch all （加of）them and they will be mine.” He was pleasing(改成pleased) by the idea.So he gave the wild goats the grass he had brought for his own goats at（去掉at） outside.When the storm was over,to his surprised(surprise) ,he found his own goats had died and the wild goats had run away and disappeared into（改成in） the woods.