摘要： Psychological studies show that some people are quick-tempered . A. at heart B. on purpose C. in person D. by nature[答案] D. by nature.[注释]by nature 天生.生来.in person 1)亲自.亲身:I shall be present at the meeting in person.身体上.外貌上:In person he was handsome, strong and healthy.at heart 1)内心里.实质上:His manners are cold, but he is at heart a kind man. (他的言谈举止有些冷淡.但实际上他是一个好心肠的人.)2)考虑的是......:When I say don't eat sweets, I have your health at heart.(我叫你别吃果糖.是考虑到你的健康.)on purpose 故意地.

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