31. What is the main idea of this article?
(A) Modern offices are great places to be.
(B) It is easier to work now than in the past.
(C) Offices have changed a lot over time.
(D) Designers have improved modern offices.

Modern offices are very different from those of the past. These days, many offices are designed to be environmentally friendly. In the past, the environment was rarely a concern. Now companies are learning that helping the environment can also save them money.

         現代辦公室與過去的辦公室有很大的不同。 如今，許多辦公室被設計成環保的environmentally friendly。 過去，環境很少rarely受到關注。 現在，公司正在學習幫助環境還可以節省金錢。

Workplaces have also become safer for employees. In the past, companies wanted to avoid injuries. But they usually focused on accidents and not on injuries that happen slowly when employees repeated the same actions over and over again. Now workplaces are beginning to focus on preventing all sorts of injuries and health problems.

         工作場所對員工也變得更加安全。 過去，公司希望避免受傷。 但是，他們通常只關注意外事件accidents，而不是關注員工一遍又一遍地over and over重複相同動作時緩慢發生的傷害injuries。 現在，工作場所開始集中精力預防各種傷害和健康問題。

Maybe the biggest change in modern offices is the flexibility they offer workers. Many employers now provide employees with flexible working hours. Some even allow their employees to work from home.

         現代辦公室最大的變化可能是它們為員工提供的彈性flexibility 。 現在，許多雇主為員工提供彈性的工作時間。 有些甚至允許員工在家中工作。