3 . Many people, including some successful men, wear the same clothing daily to focus their decision-making energy on more important things.     1     Julia, an art teacher, is wearing the same dress for the first 100 days of school to create awareness of the environmental costs of fast fashion.

Available online or from various shops, it allows everyone to adopt the latest fashion trends instantly. Though that sounds like a win-win for all, the rapid change in styles and the affordable prices result in impulse (冲动) purchases, many of which are thrown away after being worn just once or twice.    2    

Julia's idea for the “One Outfit (服装), 100 Days” began as a comment she made to her husband during the summer.     3     Moreover, it would serve as a great lesson for her new students. Selecting a perfect outfit for the challenge was a little tricky.After some consideration, Julia settled on a plain dress. Though she has a backup dress, Julia plans to use it only if absolutely necessary.

    4     It has also inspired some of her colleagues and her husband to take up the challenge. Julia says the experiment has forced her to rethink her attitude towards clothes. She values things more now—respecting the planet for her children and trying to value herself in a different way, as opposed to caring so much about what she looks like.     5     Reuse, recycle, and, most importantly, reduce.

People have been exploring the secrets of ancient Maya civilisation for     1     (age). It is the lack of modern technology in Maya society     2     makes its achievements mysterious. The Maya built     3     (impress) palaces and temples without the use of wheels and metal tools. They knew a lot about mathematics and astronomy. What’s     4     (much), they invented a writing system, which was so complex that no one has been able to interpret it completely. Its civilisation was     5     its peak by 700 AD. But it began to mysteriously decline within just a couple of generations.

People are searching for the reason why Maya civilisation     6     (collapse). Researchers have different opinions about it. Maybe it is due to a natural disaster or a deadly disease. Some research seems to show that the Maya people themselves may have played     7     role in their downfall. Turning wetlands into fields for agriculture, they reduced     8     (they) ability to cope with natural disasters. Therefore, a series of droughts occurred around 900 AD,     9     (lead) to food shortages, conflicts and     10     ( eventual) the downfall of the cities.

The rise and fall of this civilisation not only give us the mysteries of the Maya but also leave us thinking about our own past, present and future.