Question 9 is based on the passage you have just heard.

听力原文

    To achieve financial security, how much you save is always more important than the amount you earn or how shrewdly you invest. (9) [If you’re under 30 years old, your goal should be to save 20% of your monthly income after tax deductions.] This is irrespective of how much you earn. Approximately 50% should be reserved for essentials like food and accommodation. The remaining 30% is for recreation and entertainment. But for many young people, it’ll be difficult to designate such a large proportion of their income for savings. (10) [If you find it hard to save any money at all, start by cutting all unnecessary spending. Allocate a tiny amount of one or two percent for savings and gradually increase that amount.] Always keep that 20% goal in mind to prevent yourself from becoming complacent. It can be challenging to stick to such a strict plan. (11) [But if you adopt the right mindset, you should be able to make it work for you.] So what should you be doing with the money that you are saving? Some must be kept easily accessible in case you need some cash in an emergency. The largest proportion should be invested in retirement plans either through your employer or privately. And you can keep some money for high risk but potentially lucrative investments. Dividends can be reinvested or used to purchase something you like. By following this plan, you should hopefully be able to enjoy your life now and still be financially secure in the future.

9. What are people under 30 advised to do to achieve financial security?（文章建议30岁以下的人如何获得经济上的保障？）

解析：C。在录音开头提到，如果你还不到30岁，你的目标应该是把每月税后收入的20%存起来。C项与此内容一致，其中Save为原词复现，one-fifth是对录音中20%的同义替换，net monthly income（每月净收入）对应录音中的monthly income after tax deductions（每月税后收入），因此正确答案为C。

错项排除：录音开头提到，为了获得经济保障，存多少钱总是比挣多少钱或者投资有多精明更重要，由此可知，讲话者认为获得经济保障的重点在于储蓄，而不在于多挣钱或精明投资，故排除A项和B项。D项利用录音结尾的high risk设置干扰，但录音中是建议人们可以留一些钱去做风险较高、潜在利润丰厚的投资，D项与此意思相悖，故排除。