It was Dragonboat Day. Shiny white tents lined the waterfront,     1     (provide) shade and refreshments for Dragon Boat paddlers(桨手)from all over California,     2     gathered around the Castaic Lake for a festive competition.

Giggling kids raced cheerfully along the lakeside beach,     3     their parents enjoying the shady picnic areas under the trees along the shore. “It’s a great day out,” said Paul Lin, co-founder for Castaic’s own Dragon Eyes team.

Dragonboat racing has been going on for thousands of years in China,     4     (initial) in honor of the Chinese water dragon deity(神)in an effort to call down rain and avoid     5     (fortune) and disaster.

In the race, a drummer     6     (use) a large traditional wooden drum to keep the paddlers on beat, while a steersman in the back keeps them in their lane.

Lin said a friend got him    7     (involve) in dragon boat racing over a decade ago. In 2018, they decided to host their own festival. “There’s     8     really special to be learned from our dragon boat motto: ‘One Boat, One Beat ’,” he said. “Paddlers come from all walks of life and that kind of     9     (close) with people is nowhere else to be seen.”

“We really want to help expand awareness and grow the sport,” Lin said. “We’re hoping one day it’ll become     10     Olympic sport.”

On a quiet morning, about 70 people were practicing the ancient art of tai chi, outside of the library in Salt Lake City, Utah. They are not    1     well-trained   group of exercisers,   but rather a class of participants who are    2    (most) homeless. The class focuses    3     (little) on mastering the exercise and more on    4    (build) a community. People have said the class relieves their stress, encourages them to get into a routine and make new friends.

Bernie   and Marita Hart, a    5    (retire) couple, began to run the free program   three years ago. They started it by approaching   homeless people    6     were pushing grocery carts near the Salt Lake City Public Library and inviting them to try    7     Hart said her   favorite part of the program has been watching the friendships among participants. They love seeing the positive impact the class    8    (have) on people's lives.

When the Harts are out of town, tai chi does not stop. Attendees take turns teaching the classes.

"Homeless people    9    (tell) what to do every place they go, but we want to encourage them   to   be    10    (leader)," Bernie   Hart   said. "They   don't   need   sympathy,   they   need something that works."

Olympic and Paralympic medals for the Tokyo 2020 Games will be made from recycled mobile phones donated by the public.

Olympic host cities have     1     (tradition) obtained the metal from mining firms. But Japan,     2     lacks its own mineral resources, is keen on taking the theme of a sustainable future a step     3     (far).

“A project which allows the people of Japan     4     (participate) in creating the medals is really good, and helps raise the environmental awareness of our citizens,” said Tokyo 2020 sports     5     (direct) Koji Murofushi. “    6     the resources of our earth are limited, we need to recycle more and avoid waste. This program is setting an example ”

Collection boxes have been placed in local offices and telecom stores and they will remain there until the metal required     7     (collect).

Members of the organizing committee put forward the idea    8     government officials and companies earlier this year and won their support.

As a result, the medals hanging around Olympic winners’ necks will carry even more meaning than usual. People’s personal memories, once     9     (store) in their smartphones and other handheld devices, will take the round shape of an Olympic medal, one of the most precious     10     (prize) in sport.

Up to 82 percent of children with healthy mothers are not easy to be obese（肥胖的）, according to research. A mother,     1     has a healthy weight, exercises regularly, eats a healthy diet, doesn’t smoke and only     2    (drink) wine in moderation, is significantly less likely     3    (have)a fat child, scientists say.

And research suggests it could be more to do with nurture(养育)    4     nature, as a mother's lifestyle appears     5    (direct) linked to the health of her child. When both mother and child follow a healthy lifestyle, the risk of obesity     6    (reduce)even more, the study of more than 24,000 children found.

The study examined the medical history and lifestyles of more than 24,000 children aged nine     7     fourteen, born to almost 17,000 women in the US. Researchers looked at the link between overall mother health and likelihood of a child     8    (be) obese.

The mother's health was judged on her height-to-weight ratio(比例), her diet, amount of physical     9    (active), smoking status and how much alcohol she drank. A healthy weight and diet, regular exercise, no smoking and moderate drinking all reduce the chance of a woman having     10     obese child.