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    【题目】It's said that if people have positive attitudes, their body may ________ a kind of chemical that helps to fight illnesses.

    A.produceB.developC.manageD.invent

    【答案】A

    【解析】

    考查动词词义辨析。句意：据说如果人们有积极的态度,他们的身体会________一种能帮助抵抗疾病的化学物质。produce产生；develop发展；manage管理；invent发明。根据句意可知此处指“产生”。故选A

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