Spending money on time-saving services reduces stress and boosts(增进）happiness，according to a new res

本文是一篇社会类短文阅读。根据一项新的研究，把钱花在节省时间的服务上可以减少压力，提高幸福感，但令人震惊的是，很少有人这样做。
【28题详解】
细节理解题。根据文章第三段The effect was clearest in the Canadian experiment, in which 60 working adults were given $40 to spend in two different ways.，可以得知在加拿大的这个试验中，参加试验的人被要求用不同的方式花钱。故选D。
【29题详解】
细节理解题。根据文章第四段〇n the day they made the time-saving purchase, they felt happier, in a better mood, and lower feelings of time stress than on the day they bought a material purchase他们在购买节省时间的物品的那天，比购买物质物品的那天更快乐，心情更好，时间压力更小。可以得知花钱雇佣别人打扫花园的人时间压力更少些。故选C。
【30题详解】
细节理解题。根据文章第五段The biggest surprise to the researchers was how few people would spend money on time-saving services，可以得知很少有人在购买节省时间服务上花钱。故选B。
【31题详解】
词义猜测题。根据“One reason,’’ said Whillans, “is that we’re very bad at remembering how much we hate doing certain tasks once the suffering has passed. That makes us less likely to take active steps to avoid that overburdened feeling in the future.”可以得知我们在做讨厌的事情时曾经的痛苦感觉过后总会遗忘，这样就不会采取积极行动，去避免将来这种难受不舒服的感觉再次发生。所以，that overburdened feeling指的是“当我们完成讨厌的任务时的不适。”故选D。