It was Mother’s Day, but the young mother was a little unhappy, because she was 800 miles away     1     her parents. In the morning she phoned her mother     2     (wish) her a happy Mother’s Day, and her mother told her about the beautiful lilacs (丁香花) in the garden. Later that day, when she told her husband about the lilacs, he said, “I know where we can find all that you want. Get our     3     (child) Peter and Lily, and come on.” So they went to drive down the country roads.

There on a small hill, they saw a lot of beautiful purple lilacs. The young woman ran     4     (quick) to enjoy the flowers. She picked a few here and a few there. On     5     (they) way home there was a smile on her face.

    6     they were passing a nursing home (敬老院), the young woman saw an old granny     7     (sit) in a chair. She had no kids with her. They stopped the car and the young woman walked to the old woman,     8     (give) the flowers to her and smiled at her. The old granny took them and thanked her again and again. She smiled happily, too.

When the young mother came back to her car, her children asked her, “Who is that old granny? Why did you give our flowers to her?”

“I don’t know her,” their mother said. “But it’s Mother’s Day, and she has no kids. I have     9     of you, and I still have my mother. Just think how     10     those flowers meant to her?”

A picture of Zhang Guimei in her teens has gone viral on China’s social media. The young girl with black-rimmed glasses and two short braids is beaming brightly into the camera. Netizens are     1     touched by the fresh-faced girl in the picture, as it tells a story of a woman who has dedicated     2     life to promoting education and fighting poverty in rural areas.

Born in Northeast China’s Heilongjiang Province in 1957, Zhang traveled to Yunnan at the age of 17 and has been     3     girls from impoverished areas pursue education for over 40 years. She helped to establish     4     country’s first senior high school to offer free education to girls from poor families. These girls would not be able to continue their studies after     5     nine years of compulsory education.

Despite having serious health     6    , Zhang Guimei took morning classes with students for 12 years. She has also racked up 110,000 kilometers visiting her students’ families     7     the years. Most of her salary and bonuses were     8     on students.     9     the school opened in 2008, it has seen more than 1,800 students progress to universities and colleges.

On Feb 25, President Xi Jinping presented an award     10     Zhang Guimei during a grand gathering to mark the nation’s poverty alleviation accomplishments and honor exceptional poverty fighters at the Great Hall of the People in Beijing.

Daisy Brown has a little brother     1     Hugo. The little boy is only five but he never, ever stops     2     questions. “How does a light turn on and     3    , Daisy? How long is a dinosaur’s tail, Aunt Grace? Why can dogs’ ears hear some noises that I can’t, Grandpa?”

He sometimes asks     4     difficult questions. “What’s in the middle of our planet(地球), Mum? Why are jellyfish so scary, Grandma? Why do frogs live in ponds, Dad? Why do tigers have striped(有条纹的) bodies, Daisy?” People usually say, “I don’t know, Hugo.”

It’s Sunday today. While Dad, Daisy and Hugo     5     walking along a street in the city centre, Hugo pointed an enormous(庞大的) new building and asks, “What’s inside there, Daisy?” Daisy doesn’t know, but their father     6    . “It’s a     7     museum.     8     go inside!”

“Fantastic! I can get some     9     for my next science project at school too,” says Daisy and then turns to Hugo. “What shall we visit     10    ?” That is a difficult question for Hugo. “I don’t know!” he says.

Many people say dolphins are very intelligent. They seem to be able to think, understand, and learn like humans or more like cats or dogs. Scientists say dolphin’s intelligence is similar to human intelligence in some     1     (way). How?

Like humans, every dolphin has     2     “name”. It is a special whistle. Animal experts think dolphins, like people, “talk” to each other     3     a lot of things, such as their ages, their feelings, or finding food. And like humans, dolphins use a system of sounds and body language to communicate.     4     understanding their conversations is not easy for humans. No one “speaks the dolphin language” yet, but some scientists are trying     5     (learn) it.

Dolphins are also social animals. They live in groups, and often come to play games from different groups and have fun, just like people. In fact,     6     (play) together is something only intelligent animals do.

Dolphins and humans both make plans to get what they want. In the seas of southern Brazil, dolphins use an     7     (interest) way to get food. When fish are near a boat, dolphins signal to fishermen to put     8     (they) nets in the water. And the man can catch a lot of fish.     9     do the dolphins help the men?     10     (actual), they can get some of the fish.

Sniffer dogs (嗅探犬) are very common at airports all over the world, where people use them to look for things against the law. Now some dogs are using their noses for a     1     (difference) purpose—coronayirus.

Dogs specially trained     2     (discover) COVID-19 have started sniffing passengers at Finland’s Helsinki-Vantaa airport.

Volunteers are training a team of 15 dogs and 10 instructors     3     (strict) for there search programme. The dogs can discover coronavirus in humans five days before they develop symptoms (症状), Anna Hielm- Bjorkman, the University of Helsinki professor who is running the test,     4     (tell) Reuters News Agency. “They are very good     5     discovering coronavirus. We come close to 100% sensitivity,” she said.

Passengers wipe their necks with cloths,     6     are then placed in a can and put in front of dogs to sniff. Within     7     (minute) people can know the result.

The test     8     (show) early promise. But more research     9     (need) to be done to make sure the efficiency of the test. At the moment, passengers who take part in the test     10     (ask) to take a swab to support the result, too.

9 . Zu Chongzhi was one of the greatest mathematicians (数学家) in ancient China. He was     1     (bear) during the Northern and Southern dynasties. From a young age, Zu was taught natural science, astronomy (天文学), math and so on.     2     little boy was interested in all of these subjects, especially in math.

Zu was best known for his calculation (计算) of pi (π). According to the record, he did all the work using nothing but wooden sticks. It took     3     (he) lots of time to work out the value—b    4     3.1415926 and 3.1415927. No one at that time was a    5     to do better than Zu. And now the achievement is still praised by people around the world. In order to remember Zu, some mathematicians suggest     6     (call) pi “Zu Lv”.

Zu was successful not only in math, but also in astronomy. He worked out that a year should be 365.24281481 days long and created the Daming Calendar.     7     government officials at that time did not agree with him. The great mathematician n    8     saw his calendar put into use. Almost ten years after his d    9     , the new calendar was finally accepted.

Zu was an inventor, too. He once made a vehicle (工具) that     10     (carry) a pointer (指针). No matter how the vehicle turned, the pointer always pointed to the south.

10 . Henry is     1     American businessman. One day, when he was sailing on a boat near San Francisco, he was carried out into the sea by a strong wind.     2     (luck), he was discovered and picked up by a London-bound (开往伦敦的) ship, so he     3     (land) in London by accident. He walked on the streets of the city alone. Unexpectedly, he was     4     (call) into a big house. There two rich     5     (brother), Oliver and Roderick, gave him a letter and told     6     (he) not to open it until two o’clock of the day. Henry didn’t know it was a million-pound bank note. He left the big house and went into a cheap restaurant to get something to eat. Everyone was     7     (polite) and impatient to him. Why?     8     he was in rags (衣衫褴褛) and looked dirty.     9     everyone’s surprise, he handed the owner a million-pound bank note to pay for the meal. On seeing the note, a    10     the people in the restaurant became friendly and tried their best to please him. Don’t you think it’s the most unbelievable story in the world?