The blacksmith Jones worked hard in his shop. The son of Mr. White, ______ rich neighbor, came to see him everyday. “Young man, why not learn to make shoe tacks (钉)?” said Jones. “It may be useful to you      day.” After a little practice, the boy found he could make some of the finest tacks. Old Mr. White died and because of the war the son lost all his goods. He _______(force) to leave home and live in another country. It happened _____ in this village many shoemakers spent a lot of money ______ (buy) tacks for their shoes and sometimes they were not able to buy them _________ there was a high demand for soldiers’ shoes. Young Mr. White, who was finding _______difficult to earn his ______ (day) bread, told the shoemakers that he would make the tacks if they would help to get him ______ (settle) in his workshop. The shoemakers were only too glad of the offer. Soon Mr. Smith found that he was making the finest tacks in the village. “How funny,” he said, “Even making tacks can bring a fortune. My trade is ______ (much) useful to me than all my former riches.”