1 . I remember the day during our first week of class when we were informed about our semester（学期） project of volunteering at a non-profit organization．When the teacher introduced us to the different organizations that needed our help，my last choice was Operation Iraqi Children （OIC）．My first impression of the organization was that it was not going to make enough of a difference with the plans I had in mind．

Then，an OIC representative gave us some details，which somewhat interested me．After doing some research， I believed that we could really do something for those kids．When I went online to the OIC website，I saw pictures of the Iraqi children．Their faces were so powerful in sending a message of their despair（绝望） and need that I joined this project without hesitation．We decided to collect as many school supplies as possible，and make them into kits——one kit，one child．

The most rewarding day for our group was project day，when all the efforts we put into collecting the items finally came together．When I saw the various supplies we had collected，it hit me that every kit we were to build that day would eventually be in the hands of an Iraqi child．Over the past four months，I had never imagined how I would feel once our project was completed．While making the kits，I realized that I had lost sight of the true meaning behind it．I had only focused on the fact that it was another school project and one I wanted to get a good grade on．When the kits were completed，and ready to be sent overseas，the warm feeling I had was one I would never forget．

In the beginning，I dared myself to make a difference in the life of another person．Now that our project is over，I realize that I have affected not only one life，but ten．With our efforts，ten young boys and girls will now be able to further their education．

3 . Early fifth-century philosopher St．Augustine famously wrote that he knew what time was unless someone asked him．Albert Einstein added another wrinkle when he theorized that time varies depending on where you measure it．Today's state-of-the-art atomic（原子的） clocks have proven Einstein right．Even advanced physics can't decisively tell us what time is, because the answer depends on the question you're asking．

Forget about time as an absolute．What if，instead of considering time in terms of astronomy,we related time to ecology？What if we allowed environmental conditions to set the tempo（节奏） of human life？We're increasingly aware of the fact that we can't control Earth systems with engineering alone，and realizing that we need to moderate（调节）our actions if we hope to live in balance．What if our definition of time reflected that？

Recently，I conceptualized a new approach to timekeeping that's connected to circumstances on our planet，conditions that might change as a result of global warming．We're now building a clock at the Anchorage Museum that reflects the total flow of several major Alaskan rivers，which are sensitive to local and global environmental changes．We've programmed it to match an atomic clock if the waterways continue to flow at their present rate．If the rivers run faster in the future on average，the clock will get ahead of standard time．If they run slower，you'll see the opposite effect．

The clock registers both short-term irregularities and long-term trends in river dynamics．It's a sort of observatory that reveals how the rivers are behaving from their own temporal frame（时间框架），and allows us to witness those changes on our smartwatches or phones．Anyone who opts to go on Alaska Mean River Time will live in harmony with the planet．Anyone who considers river time in relation to atomic time will encounter a major imbalance and may be motivated to counteract it by consuming less fuel or supporting greener policies．

Even if this method of timekeeping is novel in its particulars，early agricultural societies also connected time to natural phenomena．In pre-Classical Greece，for instance，people“corrected”official calendars by shifting dates forward or backward to reflect the change of season．Temporal connection to the environment was vital to their survival．Likewise，river time and other timekeeping systems we're developing may encourage environmental awareness．

When St．Augustine admitted his inability to define time， he highlighted one of time 's most noticeable qualities：Time becomes meaningful only in a defined context．Any timekeeping system is valid，and each is as praiseworthy as its purpose．

There     1    (be) a dramatic rise in the number of extreme weather events over the past 20 years,    2    (cause) largely by rising global temperatures,according to a new report from the United Nations. From 2000 to 2019, there were 7,348 major natural disasters around the world,    3    (result) in USD 2,970 billion in economic loss．Much of this increase can be due to climate change. The findings show a critical need     4     (invest) in disaster prevention.

Why do we dream？Scientists aren't completely sure,and they have diverse    1     (idea)．Dreams might be a side effect of memory making.When you sleep,your brain sorts through everything     2     happened during the day，trying to link new experiences to old memories.As it     3     (connect) things，your brain turns them into a story,and you get a dream．

8 . Get up at 6 am, arrive at the hospital one hour earlier to help patients check in, and accompany patients during consultations… In recent years, “patient escorts” has emerged as a new industry, and those who have taken on this career are known as “people who sell time”, 26-year-old Zhang Tian is one of them.

September 4 was a lucky day for Zhang Tian. On this day, Zhang Tian saw a video about patient escorts on a short video platform. The daily routine of patient escorts shown in the video fascinated her and gradually inspired her to take this on as a business. She browsed through many platforms and read multiple information and found there indeed exists a certain demand for patient escorts, especially for the elderly, children, and pregnant women. Since she had never engaged in this kind of work before, she spent two days in major hospitals in Wuhan, in order to familiarize herself with all the departments on different floors, as well as the processes of medical consultation and preparation for surgery.

After preliminary preparatory (预备的) work, Zhang Tian posted a video of myself-introduction on major social platforms, talking about the help and services a patient escort provides, as well as some tips for a quick and convenient medical consultation. At first, she was a little worried that her video would go unnoticed. However, after she uploaded the video, it got over 100 likes and she received her first ever offer as a patient escort.

The memory of her first task is still alive and fresh in her mind. She received a phone call on September 9 from a man whose father was seriously ill and might need surgery. He wanted Zhang Tian to accompany his father through his consultation and treatment.” Zhang Tian made full preparations before meeting her first client and did a very good job despite her nervousness.

“Later, the family expressed their gratitude to me over and over again, which warmed my heart and gave me a sense of achievement.” Zhang Tian said.

Sam is an in-real-life streamer（播主），and he live streams himself just going about his day．While riding his bike home     1     a cold night，he came across a sad-looking elderly woman wandering the streets by herself．The poor woman wasn't able to give him any information about     2     she lived．Sam walked her to a nearby convenience store so that she could     3    （safe） wait for the police to take her home．