2. 外语
  3. One afternoon in January 1989, Susan Sharp, 43, and her 8-year-old son, David, were walking hard【C1】______an icy parking lot,【C2

One afternoon in January 1989, Susan Sharp, 43, and her 8-year-old son, David, were walking hard【C1】______an icy parking lot,【C2

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问题    One afternoon in January 1989, Susan Sharp, 43, and her 8-year-old son, David, were walking hard【C1】______an icy parking lot,【C2】______Susan’s cane slid on the ice. She【C3】______face first into the mud. David【C4】______to his mother’s side.
   "Are you all right, Mom?"
【C5】______, Susan pulled herself up. "I’m okay, honey, "she said.
   It had been nearly two years since Susan 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. 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 so a nail stretched out of the bottom?" he asked his mother.
   "【C14】______the sharp end would scratch floors," Susan said.
   "No, Mom. I could make it like a hall-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 Susan 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 closely. Today, David is nearly【C19】______of his speech defect, and his cane is waiting to be widely used.【C20】______the boy who once people had trouble talking now hopes to start making canes for people who have trouble walking.
【C15】
选项 A、with
B、off
C、at
D、to
答案B
解析 David想发明一种一松开按钮钉子就自动收回去的手杖。take…off…意为“把……从……移开或拿下”。
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