论文部分内容阅读
第三部分:阅读理解阅读下列短文,从每题所给的四个选项(A、B、C 和 D)中,选出最佳选项。AEarly one morning,more than a hundred yearsago.an American inventor called Hias Howe finallyfell asleep.He had been working all night on thedesign of a sewing machine but he had run into avery difficult probl