单选题 《复合题被拆开情况》　　A thief dropped a winning lottery ticket(彩票) at the scene of his crime, but he has been given a lesson in【C1】________. The man whom he robbed (抢劫) 【C2】________the ticket and won the ￡25, 000 prize, but he managed to find the thief, and handed over the【C3】________.　　The robbery happened when Professor Sabbatuccci was changing a tyre(轮胎) on a highway. Another motorist who stopped to【C4】________stole a suitcase from his car and drove off. The professor found the【C5】________ticket and put it in his pocket before【C6】________home.　　Next day, the professor saw the lottery【C7】________on TV and realized it was a winner.　　He【C8】________the ￡ 25, 000 prize, then began a【C9】________ with his conscience(良心). In the end, he decided he could not keep the money【C10】________he had been robbed. He then put a【C11】________in newspapers and made an announcement on the radio, 【C12】________: I’m trying to find the man who robbed me. I have ￡ 25,000 for him—a lottery【C13】________. Please meet me.　　The professor received hundreds of【C14】________from people who were hoping to【C15】________him into handing them the cash. But there was one voice he【C16】________—and he arranged to meet the man in a park.　　The robber gave back the【C17】________and burst into tears. He could not【C18】________what was happening. "Why didn’t you【C19】________ the money?" he asked. The professor replied: "I couldn’t because it’s not mine. "Then he walked off, turning down the thief’s【C20】________ to share the prize.《问题》：【C19】