9 单选 The study showed that those who had worked as boys enjoyed happier and more _ lives than those who had not. (2分)A. negativeB. productiveC. problematicD. personal

本题考查词汇辨析，解题思路是根据句子语境，判断出与“happier”并列且能体现积极意义的词汇。

• 首先分析句子 “The study showed that those who had worked as boys enjoyed happier and more _ lives than those who had not.” 的意思，研究表明那些小时候工作过的人比没工作过的人拥有更快乐和更怎样的生活。
• 接着看各个选项：
  • A选项 “negative” 意为“消极的”，与 “happier” 所表达的积极意义相悖，不符合句子逻辑，所以A选项错误。
  • B选项 “productive” 意为“富有成效的；多产的”，“more productive lives” 表示更有成效的生活，与 “happier” 并列，能体现出积极的生活状态，符合句子语境，所以B选项正确。
  • C选项 “problematic” 意为“有问题的”，同样与 “happier” 的积极意义不符，不符合句子逻辑，所以C选项错误。
  • D选项 “personal” 意为“个人的”，“more personal lives” 强调个人性，但不能很好地与 “happier” 形成并列且体现出积极的生活状态，所以D选项错误。