It is often said that the best way to solve a hard problem is to sleep on it. Is it     21    ? A new study shows it is.

The scientists at Northwestern University, US, found that sleeping is useful in both strengthening and reorganizing memory. This can help you solve problems.

The scientists did a(n)     22     on 57 university students. They asked students to solve difficult puzzles on the first day. Students worked on each puzzle while listening to different music. The scientists    23     students to remember the music they heard while solving the puzzles. Finally, there were     24     six puzzles that the students hadn’t solved.

The students then went back home to sleep. They were given special sleep-observing and music boxes. The music boxes played music     25     with the unsolved puzzles while the students fell asleep. At the moment they were able to dream and reorganize their memories.

The next morning, the students     26     to try the unsolved puzzles. The scientists found percent more students could solve them. The music made the memories they had of the puzzles while they were sleeping     27    . It allowed them to “work” on the puzzles in their sleep.

In an earlier time, studies of both people and animals have shown that sleep can not only strengthen memory, but also help us organize and send information. This study offers more

I was cycling and saw a person about 250 meters ahead of me. I could tell I was cycling a little f    56     than him. I decided to catch up with him. I had about a kilometre to go on the road before turning off.

I started cycling more and more quickly. After a while, I was o    57     about 100 metres behind him, so I really sped up and tried my best.

Finally, I passed him. On the inside, I felt so d    58    . I defeated him! But he didn’t know we were racing.

After I passed him, I felt so happy and rode on. Soon I found that I had missed my turn and had to r    59    .

Isn’t that what happens in life when we compete with others, trying to outdo them or trying to show that we are more s    60     or more important? We think it is an exciting moment, so we spend our time and e    61     running after them and miss out on our own paths.

The problem with an unhealthy race is that it’s a never ending cycle. There will always be s    62     ahead of you in one way or another. What you should do is just run your own race and wish others well.

Wherever you go, no matter what the weather is, always bring your own sunshine.

Joe Hammer loved basketball. One afternoon on his way to a basketball game, he was walking and dreaming about playing college basketball the following year.

At the same time as Joe was walking to the game, Kim Glen was walking to his car. Kim felt tired. He knew it was time to stop working so hard. Kim got into his car and headed home. He was driving down Seventh Avenue when he had a heart attack. Kim’s car hit Joe so hard that Joe was thrown five feet into the air.

Joe woke up in a hospital room. When he learned that both his legs were broken, he realized his college basketball dream were over. Joe did what the doctors told him, but his progress was slow. When he left the hospital, Joe was sent to a center for physical therapy(理疗).

A week after he arrived there, he met Sunny Chen. Sunny had been a coach before. His legs were paralyzed(瘫痪)from a skiing accident. Although Sunny couldn’t move his legs, he coached a basketball team called the Suns. Everyone on the team played from a wheelchair. Sunny invited Joe to join them. Joe played badly, but for the first time since the accident, he stopped feeling sorry for himself.

After becoming a part of the Suns, Joe improved quickly. Basketball was like medicine for him. And whenever Joe became sad or angry, Sunny was there to comfort and help him. The day before Joe left the center, he had dinner with Sunny. He asked Sunny how he managed to be so happy, confident and generous, even with his paralysis.

Sunny smiled and said, “It was quite simple._______________”