More than 5 million shared bikes on the Chinese mainland are using positioning and navigation services     1     are provided by the country’s Beidou Navigation Satellite System. These shared bikes have been equipped     2     domestically developed Beidou-based positioning chips. These chips feature high accuracy and sensitivity, and low power consumption, which allow for an easier management for city authorities. Since June 2020, 59 Beidou satellites, including the first four experimental ones,     3     (lift) on the Long March 3-series rockets from the Xichang Satellite Launch Center in Sichuan province.

Since I was first in China, my life, and China itself,     1     (develop) and changed a lot. I came here in 2015 to travel and visit a friend. I had a fantastic time,     2     (explore) beautiful places in Beijing, Shanghai, Sichuan and Hong Kong within 5 weeks. China is a country rich in old customs, and one full of modern wonders. Although some things will always stay the same, other things are changing at a speed beyond     3     (imagine).

We all know the Olympic Games.     1     do you know the Mud Olympic Games? Every year, about 400 people from all over Europe meet in a small town in northern Germany take part in the Mud Olympics—the     2     (muddy) sports meeting in the world. It is held     3     the beach when the tide is out, so it is very muddy.

Mary     1     drawings were shown at the exhibition last month is a model student     2     is often praised for her good work at school. As soon as we got into the exhibition hall our attention was attracted by a very large picture     3     was hung on the wall in front of us. It was the best picture     4     I had ever seen.

A 90-year-old has been awarded “Woman Of The Year” for     1     (be) Britain’s oldest full-time employee — still working 40 hours a week. Now Irene Astbury works from 9 am to 5 pm daily at the pet shop in Macclesfield,     2     she opened with her late husband Les. Her years of hard work have     3     (final) been acknowledged after a customer nominated (提名) her to be Cheshire’s Woman Of The Year.

It’s well known that drugs like alcohol are addictive for people. What’s not so well known is that some people can become addicted     1     behaviors. Research finds that the average college student     2     (use) a smartphone for about nine hours each day. That’s even     3     (long) than the time many of those students spend     4     (sleep). In fact, according to a new study in August, such extended cell phone use shows that technology can become an     5     (addict), a type of uncontrolled and unhealthy habit.

Halloween began with the Celts(凯尔特人),     1     lived in Ireland over two thousand years ago. Back then, the holiday was an end—of summer harvest feast     2     (call) Samhain, a time when food     3     (store) for the winter. Samhain also marked the Celts’ New Year.     4     Samhain Eve, the Celts believed that the ghosts of the dead walked the earth as they crossed to the underworld, and that     5     (fairy) and demons came out of hiding.

Since the 1970s, scientists     1     (search) for ways to link the brain with computers. Brain-computer interface technology could help people with disabilities send commands to machines. Recently, two researchers, Jose Millan and Michele Tavella from the Federal Polytechnic School in Lausanne, Switzerland, showed a small robotic wheelchair     2     (direct) by a person’s thoughts. In the laboratory, Tavella operated the wheelchair just by thinking about moving his left or right hand. He could even talk as he watched the vehicle and guided     3     with his thoughts.

If you’re looking for a unique adventure, the Space and Aviation Center (SAC) is the place to be. The Center provides trainees     1     programs designed to challenge and inspire. More than 750,000 have graduated from SAC, with many     2     (seek) employment in engineering, aviation, education, medicine, and a wide variety of other professions. They come to camp, wanting to know     3     it is like to be an astronaut or a pilot, and they leave with real-world applications for what they’re studying in the classroom. With all the programs, teamwork is key as trainees learn the importance of leadership and     4     (be) part of a bigger task.

This Side of Paradise, Fitzgerald’s first novel,     1     (publish) in 1920. Encouraged by its success, Fitzgerald began to devote more time to his writing. Then he continued with the novel The Beautiful and Damned (1922), a collection of short stories Tales of the Jazz Age (1922). But his     2     (great) success of all his works was The Great Gatsby, published in 1925,     3     quickly brought him praise from the literary world. Then, in 1926, he published another collection of short stories All the Sad Young Men.