Many objects that people use each day started with a simple idea. These objects have often changed the way we 46 . Some help us to do a job more 47 . Others fill a need or solve a problem. In 1858, Lipman had such an 48 . He took out a pencil, a piece of paper, 49 an eraser. Then he began to write. Sometimes he needed to 50  a word. Each time he had to search under his books and papers to   51 the eraser. “ I wish my eraser would stay in one 52 !” he said. Then Lipman had his simple idea. He 53  a groove( 凹槽) in one end of the pencil. He glued(粘牢) the eraser into the groove. Lipman had solved his problem. Later he thought that others might like to have such a pencil. So he sold his 54 .Some pencils with erasers were 55 . His design earned $ 100000. 小题1: A．study B．live C．sleep D．walk 小题2: A．easily B．correctly C．carefully D．normally 小题3: A．article B．aim C．idea D．action 小题4: A．so B．and C．but D．as 小题5: A．spell B．read C．write D．change 小题6: A．look B．see C．watch D．find 小题7: A．place B．desk C．book D．hand 小题8: A．marked B．prepared C．cut D．invented 小题9: A．books B．pencil C．design D．eraser 小题10: A．wonderful B．expensive C．colourful D．common