It was only a dollar. Ben saw it on the floor as he sat at the back of his math class. He could take it for his money, but he picked it up ________ and brought it to his teacher, Mattison.

Mattison was a little surprised, ________ many people would just keep it. She advised Ben to tape (用胶带粘住) it to the whiteboard where she always put ________ things. Maybe the dollar was the money for lunch or bus tickets for the student who lost it. A day or two later, neither the teacher nor her student ________ it.

Rose, a senior, asked Mattison why it was there. The teacher was still waiting for the owner, so she ________, “I don’t know.” Rose took the tape from Mattison’s desk and taped a ________ dollar to the board.

The two dollar bills, side by side, woke some things in Mattison’s students. They taped up ________ bills. The experienced teacher started to leave the tape next to the whiteboard. The effort (努力) snowballed and it really made a great difference.

The amount (数量) went on growing until it ________ $175. That left Mattison to decide on the best ________. Mattison asked her students if they’d like to use the money ________ something good. Their answer was to tape more money to the whiteboard to push the amount.

With our already busy lives, finding time to exercise can be impossible. So maybe it would help if there was “a best time” to exercise.

There are clear benefits to exercising in the morning. Many of us have more free time than later in the day, and it may be easier for us to keep a morning plan. A study found that people could sleep better when they exercised in the morning or had the physical activity during the whole day. Exercising on an empty stomach (空腹) before breakfast could also have less fat (脂肪) and keep healthier.

So, good news for early birds, but what if you’re not a morning person? Working out in the afternoon or evening is also good, but different. For example, your body’s ability reaches the highest level in the afternoon, according to a 2010 study. Also, in the afternoon and evening, your mind is the quickest, and your heart rate and blood (血) pressure are lowest, and you aren’t getting hurt (受伤) easily when exercising.

But can this happen? Deciding on if you are a man or a woman? Our bodies are different, after all, so the best time to exercise may be different too. Want to reduce (降低) your blood pressure and you are a woman? Exercise in the morning. Want to improve your heart health and you are a man? Evening is better for you. But, a 2022 study found that it’s both OK for them to exercise at either time of day.

So what time is best? It seems the answer is: whatever time is best for you!

Life can be stressful (压力重的) sometimes. But you can have less stress     41     (quick) by using some simple ways. When you practice these ways more, it will be     42     (fast) to find your peace. So,     43     you feel stressed the next time, try the ways below!

Practicing deep breathing (深呼吸) is really useful. It sends messages to the mind: You are safe and it’s OK     44     (relax). Breathing exercises is simple. First, breathe in through your nose     45     a short time. Then, breathe out slowly through your mouth.     46     will be more relaxing.

Laughing is also very good for you. Laughter is often called the best     47     (medicine). A good laugh helps you have less stress. Watch your favorite TV shows or     48     (share) some funny pictures with your friends, you will see how you feel soon!

Listening to music helps a lot. Music can help bring out your hormones (荷尔蒙) and you’ll feel happy. According to some     49     (scientist), classical music (古典音乐) can slow down your heart rate and lower your blood pressure. But, in fact, listening to     50     piece of music you like is good for you.

You can use your smart phone to order your favorite books from the library and the books will come to your home in just a few hours. Doesn’t that sound great?     51    

The project is called “Love to Read at Home.” Readers can log on (登陆) to a small program and borrow books for free. They only need to pay a delivery fee (配送费) of six yuan for one to three books. Each user can borrow up to eight books at a time for 30 days. Readers can pick from more than 20,000 books.     52    

“This new online-to-offline service takes readers less time, and it becomes more and more popular.” said Xu Shuming, an expert, “    53    ”

The service is the greatest, said Xu. One main reason is China has strong delivery and e-commerce (电子商务) service.     54     Today, there are more than 3,300 public libraries in China. We look forward to more of them having this service!

56. 下周末，你校将举行校园机器人嘉年华（the Robot Festival）。假如你是 Li Hua，请根据下表信息用英语给你的好友Mike写一封邮件 ，介绍活动的相关内容及意义，并邀请他参加此次活动。

On hearing that you’re interested in robots, I’d like to tell you something about our Robot Festival.

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Yours,

Li Hua