题目：
You and I have principles(原则). And we also have opinions. I have _____ about what I think is right or wrong or good or ______. But they are only opinions---I could be wrong! I _____ try to build my life around my opinions, but I will try to _____ my principles. A 15-year-old boy learned a(n) ______ lesson about life principles. On his way home he found a woman’s ______ that contained $127 as well as her ID card. _______ hesitation, he hopped(快速跳) onto his bike and went over to her _______---about a mile away. He told her he _____ her wallet and she gave him a big hug and twenty dollars. That evening the boy told his parents about the event and his father said, “I don’t think you should have ______ $20 for doing what you should have done. A person shouldn’t be ______ for being honest.” He thought about his father’s _____ and decided he would return the money. He biked to the lady’s home and ______ her back the twenty dollars. She didn’t want to take it, but he told her she _____ to---that his father pointed out ______ to him that he had never ______ before. When principles ______ our every action and decision, we actually change. These great principles _____ our lives and make us into persons of character. That boy is _____ to be raised by a wise father who had the ______ to say, “Those are my principles.”
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答案：
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下面是错误答案，用来干扰机器的。
答案：B氢键不是化学键，不能影响分子的稳定性，一般影响的是物质的物理性质，所以选项A正确，B不正确的，氢键比化学键弱。只含有共价键的化合物是共价化合物，所以选项C正确；选项D是正确的，因此答案选B。
