If you play on a mobile phone while you     1     (wait) for a bus in Shenzhen, it’s likely that you will miss it,     2     all the buses in the city are now quiet electric ones. Shenzhen replaced over 16, 000 buses     3    electric ones in 2017 and made all of its taxis electric ones the next year.

The change from noisy diesel (柴油) buses to quiet electric buses     4    (call) a silent revolution. “With diesel buses, I can remember     5     (stand) at the bus stop and the heat, noise and emissions (排放物) made me extremely     6    (comfortable) in the summer, ”said Joseph Ma, general    7     (manage) at Shenzhen Bus Group. “The electric buses have made     8     huge difference.” With the change, it is report d that Shenzhen Bus Group could save 160, 000 tons     9     coal per year and reduce CO2 emissions by 440, 00 tons every year.

In fact, some foreign     10     (city) are also trying to move to electric buses. For example, New York has planned to make all its buses electric by 2040.

6 . It was a freezing cold winter’s night back in 2017, as Adrian Young raced his father, Will, to their car in the empty carpark of a local restaurant in Southern Queensland. His mother, Jennifer, followed with Adrian’s younger sister. They were hurrying to the car to escape the cold 1℃ night. But as they reached the car, Adrian’s eyes rested on the back of the carpark, where a man was lying on a makeshift bed of blankets. “I felt bad as I was trying to get out of the cold and he was about to sleep in the freezing cold,” says Adrian.

Will went over to the man to see if he was safe, and also gave him about $20, hoping he could put it towards some hot food or perhaps a warm overcoat.

Will and Jennifer quickly forgot about the encounter (相遇), but Adrian couldn’t shake the feeling that he hadn’t done enough. For the first time he realized that there were lots of other homeless people without a warm bed.

Adrian told his parents he wanted to buy the homeless man a house to live in but when he discovered this wasn’t possible, he kept on asking questions. “I want to do more to help so I decided that I would use my own money and take him a backpack with some warm clothes and special food,” he says.

The fifth grader didn’t want to stop there so, together with his mother and little sister helping out, he decided to make 50 care packs with necessities (必需品) like toothbrushes along with special treats. The family sent the bags to Base Services, an organization helping the homeless. “We wanted people to feel cared for and know we’d put these bags together with love, ”says Jennifer, who also made sure to add the label (标签)‘I care for you’, with love onto every pack.

Since then, Adrian and his family have created more than 100 care packs and raised almost $5,000 on the fundraising site www. gofundme. com.

The Kolahoi Green Heights is a hotel in the Himalayan mountains. With so much ice and snow around from December to March, last year, people at the Kolahoi hotel decided     1    (build) an igloo (冰屋) cafe. Syed Wasim Shah,     2     created the café, got the idea from an igloo village in Switzerland.It could hold about 16 people.

This year, they rebuilt it and created    3     was believed to be a new record — the     4    (big) igloo cafe in the world. They all it the Snoglu, which can hold up to 40 people at a time.The benches and tables    5    (make) out of packed snow and sheep skins cover the icy benches to make    6     (they) more comfortable.

The Snoglu is separated    7     two different parts. One part holds artwork created from snow and ice. The other part is a working cafe,    8    (sell) coffee, hot chocolate,and snacks. Mr. Shah says the cafe focuses on items that can be served    9    (immediate), since it’s so cold inside that most guests don’t want to stay long.

Next year, Mr. Shah plans to rebuild the cafe again. He also wants to create an igloo village, with    10    (room) where people can spend the night.

9 . My little brother and sister, Tex and Indi, are five-year-old twins. When it comes to being lovable, they’re the _______. But when it comes to keeping _______, they’re the worst!

My parents _______ to celebrate their wedding anniversary by taking a _______. But at the last minute, my dad came home from work with bad news that their getaway would have to _______. That’s when I came up with the _______ to surprise my parents with a cake. I could get help from Abuela, the grandmother of my friend Ollie.

Once I had my mom’s _______ to go to Ollie’s, I hurried toward the door. Indi and Tex ran up. I whispered to them I was going to _______ a cake for Mom and Dad’s anniversary. They wanted to _______.

“You can stay here and make cards. But remember, we don't say a single thing about the ________ until after dinner,” I said. They nodded.

Abuela was extremely ________, we made a beautiful cake. I brought it home and ________ it on a shelf in the garage. ________ was going as I’d hoped until I walked into the house. Tex and Indi waved their cards and ________ “Surprise!”

“No,” I said. “Not yet!” Right then, my mom rushed in and asked what was ________!”

“We won’t ________ you about the cake!” said the twins.

“I was trying to give you and dad the perfect anniversary surprise,” I ________, “but two members of this family just ________ everything.”

“We don’t care if it’s a ________,” said my mom. “It’s the thought that counts, and you just ________!”

10 . Some words copy the sounds made by the things they describe, like “buzz” or “hiss”or “zip”. But what if the way a word sounds could suggest some other feature of an object like its shape?

A new study suggests not only that it can but that the same word can do so across many languages. Marcus Perlman,a lecturer at the University of Birmingham, says that, a century ago，linguists(语言学家)insisted the words used to refer to various objects and actions are arbitrary(随意的) and that words don't necessarily look or sound like the things they refer to. That makes sense because different languages have different words for the same thing. One person’s pup is another one’s perro. But there’s a lot of evidence now suggesting it is false.

To further explore this connection between words and their meanings, Perlman and his colleagues turned to something called the bouba/kiki effect. With the help of 22 volunteers, the researchers tested it in 25 different languages. Participants were told to look at two shapes-one looks like a cloud which is somewhat round, and the other one is more pointy, maybe looks more like a star-and then listen to the sound: either “bouba” or “kiki”,both of which are totally made up. Then they were asked,“Which one is bouba and which one is kiki?” Most participants said the rounder shape was bouba and the pointy one was kiki. This suggests there is some widely observed connection between the spoken words and the visual features of the shapes.

As to what that could mean about the evolution(演变)of language：imagine our ancestors when they started using spoken words to refer to things. “They couldn’t say ‘Listen, my friend, now we’re gonna call this new object a table.’” So to get the conversation off the ground, they probably tried to come up with sounds that somehow suggested the object at hand.