Four years ago,Chinese skater Wu Dajing introduced himself to the skating world by winning a silver medal at the Sochi Olympic Winter Games.At this year's Pyeong Chang Olympics,Wu not only returned,but also made history.

On Feb.22nd,2018,Wu won the gold medal in the men's short?track 500-?meter race.He set a new world record with a time of 39.584 seconds.He also became the first Chinese man to take home an Olympic short?track gold medal.BBC said Wu's win was “flawless”,because he was much faster than all of the other skaters.

“I didn't give them a chance and I kept my speed from the start,” he told the reporter after the match.

But China's short?track teams didn't do well in general at the Games.Chinese skaters in the women's 500 meters,3000-?meter relay and men's 1500 meters all failed to take home the gold.Wu was China's biggest hope,which put a lot of pressure on him.But he proved himself with his great performance.

Wu is now known as a highly talented skater.But things were not always that way.When Wu joined the national team in 2010,he was seen as almost “nothing” compared to gifted skaters like Zhou Yang and Fan Kexin,as his coaches said at the time.Their words made him quite upset.But Wu didn't want to give up and worked as hard as he could.He practiced skating all year round.He even didn't return to his home town for the holidays for 10 years.“I believe in myself,” he told the reporter after his match at the Olympics.

1.What does the underlined word “flawless” mean?

A.Ordinary. B.Common. C.Perfect. D.Difficult.

2.What does the last paragraph mainly tell us?

A.The national team and coaches regarded Wu as a talented skater all the way.

B.Wu kept on practicing skating all year round even in the holidays for 10 years.

C.Zhou Yang and Fan Kexin were more hard?working on skating than Wu Dajing.

D.Because of Wu's hard work,confidence and strong will,he finally succeeded.

3.According to the passage,which of the following is TRUE?

A.Wu won a gold metal at the Sochi Olympic Winter Games four years ago.

B.Wu broke the world record with a time of 39.584 seconds and made history.

C.Wu's coaches placed great hope on him when he joined the national team.

D.Chinese skaters in women's 500 metres and 3000?metre relay took home the gold.

4.Which one might be the best title of this passage?

A.From Zero to Skating Hero B.Short?track 500?meter Race

C.Pyeong Chang Winter Olympics D.Rising of China's Bright Skiing Star

Is there a way to quickly recall information just before taking an exam? Walking backwards might be a solution. Scientists from the University of Roehampton in the UK said this activity can help people improve their short-term memory.

Researchers asked 114 volunteers to watch a video. After watching the video, participants were split (分成) into three groups. One group was told to walk 10 meters forward. The second group walked 10 meters backward. The third group stood in one place. All three groups were then asked 20 questions about what they saw in the video.

The scientists found that the backward-walking group got two more answers correct on average(平均) than the other two groups.

This suggests that the link between the concepts (概念) of time and space is important in terms of how our minds form memories. “Time is really expressed via (通过) space,” Aleksandar Aksentijevic, who led the study, told the Daily Mail. When you walk backward, you see things from a different angle (角度) compared to walking forward. This difference helps people recall things that happened in the past.

And walking backward is not just good for our brains. It is also good for the rest of our body. Compared to walking forward, walking backward is more challenging. This can help us improve our fitness, according to New Scientist Walking backward uses more energy in a short time and bums more calories.

In addition, walking backward is less stressful for our knees. It could be helpful for people who often have pain in their knees, according to researchers from the University of Oregon in the US. Walking backward also keeps our spines (脊柱) strong, which can help to ease pain in the lower back. This might be why many old people like walking backward.

1.In the research, the second group ________.

A.watched a video after walking

B.answered more questions correctly

C.walked farther than the other groups

2.Why can walking backward help people improve their short-term memory?

A.Because space is really expressed via time.

B.Because the different angle can help to recall things.

C.Because our minds form memories by thinking back.

3.According to the passage, walking backward is good for our ________.

A.hands B.eyes C.spines

4.What does the underlined word “ease” mean?

A.解除 B.缓解 C.远离

5.What’s the best title of this passage?

A.Let’s Walk Backward Today.

B.Walking Backward Is Good for Brains.

C.How to Improve Our Short--- Term Memory

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