完形填空。 The hardworking blacksmith John used to work all day in his shop and so hard working was he that at times he would make the sparks fly from his hammer. The son of Mr. Smith, a rich neighbor,   __ 1 __   come to see the blacksmith every day and for hours and hours he would enjoy himself   __ 2 __   how the tradesman worked. 'Young man, why don't you try your   __ 3 __   at making shoe tacks, even if it is only to __ 4 __   the time?' said the blacksmith. 'Who knows, one day, it may be of   __ 5 __ to you.' The boy began to see what he could do. After a little __ 6 __  he found that he was becoming very  __ 7 __  and soon he could make some of the finest tacks. Old Mr. Smith died and the son on   __ 8 __   of the war lost all his property. He had to leave home and was forced to   __ 9 __   residence in another country. It so   __ 10 __   that in this village there were numerous shoemakers who were spending a lot of money to buy   __ 11 __   for their shoes and at times even   __ 12 __   they paid high prices they were not able to get what they wanted, because in that part of the country there was a high   __ 13 __   for soldiers' shoes. Our young Mr. Smith, who was finding it difficult to    __ 14 __   his daily bread, remembered that once upon a time he had learned the art of making tacks(鞋钉)and had a sudden   __ 15 __ of making a bargain with the shoemakers. He told them that he would make the tacks if they would help him    __ 16 __   a workshop. The shoemakers were only too glad of the    __ 17 __. And after a while, Mr. Smith found that he was making the finest tacks in the   __ 18 __. 'How    __ 19 __it seems,' he used to say, 'Even making tacks can bring a   __ 20 __. My trade is more useful to me than all my former property.' (     )1. A. used to (     )2. A. seeing (     )3. A. energy (     )4. A. save (     )5. A. danger (     )6. A. practice (     )7. A. surprised (     )8. A. term (     )9. A. take over (     )10. A. happened (     )11. A. metal (     )12. A. as (     )13. A. demand (     )14. A. eat (     )15. A. request (     )16. A. open (     )17. A. offer (     )18. A. valley (     )19. A. fascinating (     )20. A. career B. had to B. watching B. luck B. lose B. interest B. message B. skilled B. top B. take down B. occurred B. tacks B. why B. price B. earn B. suggestion B. settle B. requirement B. village B. satisfactory B. change C. wanted to C. staring C. hand C. pass C. use C. revision C. satisfied C. account C. take off C. charged C. furs C. how C. praise C. make C. opinion C. close C. order C. country C. funny C. fortune D. needed to D. looking D. way D. devote D. importance D. promotion D. determined D. behalf D. take up D. adapted D. cloth D. though D. call D. dry D. idea D. locate D. arrangement D. world D. strange D. job