2. 外语
  3. One afternoon in January 1989, Suzan Sharp, 43, and her 8-year-old son, David, were walking hard【C1】______an icy parking lot(停车场

One afternoon in January 1989, Suzan Sharp, 43, and her 8-year-old son, David, were walking hard【C1】______an icy parking lot(停车场

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问题    One afternoon in January 1989, Suzan Sharp, 43, and her 8-year-old son, David, were walking hard【C1】______an icy parking lot(停车场),【C2】______Suzan’s cane(手杖)slid on the ice. She【C3】______face-first into the mud. David【C4】______to his mother’s side. "Are you all right, Mom?"【C5】______, Suzan pulled herself up. "I’m okay, honey, " she said.
   It had been nearly two years since Suzan had trouble walking. She was falling more【C6】______now. Every inch of ice was a【C7】______danger for her. "I wish I could do【C8】______, " the boy thought.
   David, too, was having【C9】______of his own. The boy had a speech defect(缺陷). At school he【C10】______asked questions or read aloud.
   One day David’s teacher announced a【C11】______assignment. "Each of you is going to come up with an invention, " she said. This was for "INVENT AMERICA !" a national competition to encourage creativity in【C12】______.
   An idea hit David one evening.【C13】______only his mother’s cane didn’t slip on the ice, he thought. "That’s it !" David realized.
   "What if I fixed your cane to a nail stretched out of the bottom?" he asked his mother.
   "【C14】______the sharp end would scratch floors, " Suzan said.
   "No, Mom. I could make it like a ball-point pen. You take your hand【C15】______the button and the nail returns back up. "
   Hours later the cane was finished. David and his father, Jeff,【C16】______as Suzan used it to walk 50 feet across the【C17】______. "It works!" she said.
   In July 1989, David was declared national winner at the annual "INVENT AMERICA!" ceremony in Washington D. C.
   As David began to make【C18】______appearances, he was forced to communicate more clearly. To- day, David is nearly【C19】______of his speech defect, and his cane is waiting to be widely used.
【C20】______the boy who once had trouble talking now hopes to start making canes for people who have trouble walking.
【C14】
选项 A、So
B、But
C、For
D、And
答案B
解析 but在此处表示转折，承接前句“what if．．”。
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