Modern people are paying more attention to exercise, while in ancient China there were also many     1     (healthy) lovers.

The great Song Dynasty Poet Su Dongpo    2     (prefer) to take long runs, and he thought that only by moving your body     3     (regular) could you have a strong body and adapt to the seasonal changes quickly.

In a letter to his friend Cheng Zhengfu, Su Dongpo talked about his exercising habit,     4     was to run five kilometers per day. He would slow     5     when he breathed hard, and sped up when his breath balanced. Su Dongpo would stop running until he was all hot and     6     (sweat).

We can see that when Su was running, he stressed “qi”, which means “energy”. Su was a fan of qigong,     7    system of deep breathing. He ran in the morning and sat in meditation at night,     8     (make) “qi” flow inside his body. After meditating for nearly 20 days, he felt his body was much     9     (strong) and could run for a long time without     10     (rest) in the middle. He believed that by practicing this way, he could live longer.

When you read a book, you’ve probably noticed that a brand new book has a rather special smell,     1     differs from that of an older book. Where does     2     come from? Three sources — the paper, the ink and the glue.

Around 200 AD, the Chinese first came up with paper, one of the greatest     3     (invent) in the world. It is made     4     wood. The wood must be processed with various chemicals     5     (add) to change its structure, to remove acid and to whiten the paper. Then comes the ink — there are many kinds. Some fade with time, while others get     6     (dark) than years ago. Finally, different glues are used to join the sheets together and attach the covers, whether hardcover     7     paperback. Therefore, you can smell different chemicals     8     (come) out of your new book.

Today, the forms of books     9     (change) dramatically since the birth of eBooks. They might be     10     (convenience), but you can’t give your copy to others as a present, and they don’t smell as nice.

Researchers at a Canadian Institute suggest how the interaction(交互) between remembering and forgetting in the brain     1    (allow) us to make more intelligent decisions based on memory. They published the review paper in the journal Neuron.

Forgetting makes us much smarter by working with memorizing     2    the following ways, the researchers say. First, letting go of outdated information lets us adapt to new situations. By     3    (forget) the older and potentially misleading information, we can adapt to new environments more     4    (easy). Second, forgetting also makes decision-making easier. We remember the important information which makes it easier for us     5    (make) wise decisions.

What and how much we remember can     6    (decide) by our environments. For example, a lawyer or a designer with a set of clients will likely remember     7    (they) names for a longer period of time. A cashier who has a changing sea of     8    (customer) every day will only remember names for a short amount of time.

The researchers point out that the motto is true: If you don’t use it, you lose it. But as this review paper shows, it can be     9       good thing. Clearing out the information you don’t need can help make room for the important stuff,     10     can make you become more intelligent.

The way you walk may be determined by your daily schedule, and it may also reflect your personality. The     1     (choose) you make can tell something about your inner thoughts. At least, that’s    2     science has proved. Lately, researchers     3     (observe) the way that people walk and how it relates to their personalities. Available online via Sage Journals, the study examines both the walking styles and personalities of 15,000 adults aged from 25 to 50. According to the study, when     4     (face) with the new challenges, fast walkers are more likely to be active while quiet people tend to walk more slowly. Meanwhile, the study has also found    5     (power) evidence that walking speed in adulthood reflects the individual’s personality. However, speeding up your walking pace can’t     6     (instant) make you the life of the party,     7     means that you needn’t change your personality. Actually, there are     8     (hide) strengths of being a quiet person as well as an active one. Make the most of your strengths,     9     you can be successful regardless of which type you fall into and     10     fast or slowly you walk.