2 . Sitting back in my seat, I can’t quite believe that I’m about to travel along the railway that many foreign experts thought was “impossible”. All this time, the song “Sky Railway” has been___________inside my head. The words “railways like massive dragons are winding among the mountains” seem particularly_________as I travel across the “roof of the world”.

I was one of the people who came from all parts of China to work on this railway._______   years to finish, the Qinghai-Tibet Railway is a record of all of our efforts to_______the most difficult engineering challenges. How to_______the delicate ecosystem (脆弱的生态) was the most important.

The first landmark to catch my eye is the splendid Qingshuihe Bridge, the world’s longest bridge built over permafrost. Look! A group of Tibetan antelopes is moving_______the bridge, with some stopping to eat grass at their_________.Thirty-three passages(通道) have been built under the railway to allow the animals to move safely and freely in their natural_______. Wild animals such as these Tibetan antelopes have now been using these_______for years. They seem totally__________that we are speeding past at over 100 kilometers an hour.

To prevent________to wetlands and grasslands, 675 bridges with________about 160 kilometer were built between Golmud and-Lhasa.

The journey has been flying by, and before I know it, we have reached Tanggula Station.________at over 5,000 metres above sea level, this is the________railway station in the world. In locations such as this, the thin air,________weather and high levels of UV radiation presented perhaps the greatest________for railway workers. To make sure we stayed________, several oxygen-making stations were built. We were also able to enjoy________breaks in lower areas.

As we pass Cuona Lake, I feel a sense of pride and achievement. It is so close to the railway that I want to________and touch its pale blue mirror-like surface. I am proud that we built our “impossible” railway, and did so with the________that the environment deserves. It truly is an extraordinary “Sky Railway”.

5 . Dozens of dolphins swam out of the polluted waters of Haifa Harbor on Tuesday. This was the first time that dolphins had visited this crowded Mediterranean Port, and researchers were surprised by the unexpected event.

Between 40 and 50 of the dolphins appeared in the busy port on Tuesday morning, obviously drawn by the fish-rich waters of Haifa Bay.

However, the bay is also full of harmful chemicals. Avia d Sheinin, professor of Haifa University’s Maritime Studies Department, said he didn’t think the dolphins were harmed by the pollution, but that he hoped they would swim back to the sea soon. “It seems that they are quite relaxed. They don’t seem to be stressed,” he said.

Haifa Bay is lined by chemical companies that have been pouring poisonous waste into the water for decades. While pollution levels have dropped in recent years, the water is still considered a health hazard, whispering warnings to those who draw near.

“There are lots of fishes in Haifa Port. Unfortunately, we couldn’t tell the dolphins that the fish are not healthy, and I don’t know what the result will be,” he told Israel Army Radio.

Hundreds of Haifa residents gathered around Haifa Bay to see the interesting sight, and researchers said this provided a rare chance to film and study the rough-toothed dolphins. In addition to the dozens of dolphins which swam into the port on Tuesday, a similar number stayed outside the breakwater (防波堤). Later Tuesday the dolphins left the port but remained near the entrance and Israel’s coastguard was patrolling (巡逻) the area to try to make sure the dolphins didn’t re-enter the poisonous waters.

Relatively little is known about rough-toothed dolphins, which are usually found in deep and warm tropical waters.

When Simon Cane was in the second grade, he began learning about all the ways humans have an impact on the environment and really took those classroom lessons to heart in a way that set him apart from his schoolmates at his elementary school, P. S. 81, in the Bronx. “He told me we drove too much and made too much pollution,” his dad, Jonathan Cane, told Runner’s World. So Simon convinced his parents to start hanging their clothes to dry, taking the stairs instead of elevators, and other “green” measures.

“For much of kindergarten and the first grade I rode my bike to Simon’s school with him on the back,” Jonathan said. “We had a lot of fun being outdoors. We’d stop to give our dog treats and generally enjoyed it.” As Simon got bigger, though, it wasn’t practical for him to ride on his father’s back, but it also didn’t make sense to ride together — both because of safety concerns and because there was no place to put away Simon’s bike. So, most of the time they drove the 1.5 miles to school.

But in 2019, when Simon was going into the third grade, the 8-year-old came up with a new way to help the planet: running the 1.5 miles to P. S. 81. And Jonathan promised his son he’d join him for as long as he wanted.

“We did a test run one day in August, and decided to give it a go. To be honest, I thought he’d blink after it got really cold or rainy, but he never did,” Jonathan said. He recalled one day when the weather was particularly bad. “It’s really raining out there today,” he told Simon. “And Simon said, ‘Well then we’re going to get wet!’ He took pride in toughing it out, and it became a really fun family routine.”

Since the start, Simon has run with his dad and their black dog, Lola, and has even inspired his mom, Nicole Sin Quee, to join in. They soon became known as “the family that runs to school”.

7 . Like all big cities, Paris has a traffic problem: lots of cars, lots of traffic jams and lots of pollution from exhaust fumes. So the city began a project to improve the situation.

Under the Velib project (‘Velib’ comes from velo liberty, or ‘bicycle freedom’) people can take a bicycle, use it for as long as they want, and then leave it at the same or another bicycle station. The first half-hour on the bike is free, but if you don’t return it after 30 minutes, you have to pay. But it’s only €1 a day or €29 a year! The bicycles are heavy (25kg), and they are all gray and have baskets. There are about 20, 000 of them in the city, and around 1, 450 bicycle stations. So there are a lot more Velib stations than the 298 subway stations!

Paris is not the first city to have a project like this. But not everybody thinks it’s a great idea. One Parisian said, “These bicycles are only for short journeys. If people want to travel across the city, they won’t use a bicycle —they’ll still use their cars.”

A city spokesman said, “The bicycle project won’t solve all our traffic problems, of course. But it might help reduce air pollution. Traffic, together with factory fumes, is a big problem. There aren’t any simple answers to traffic problems and pollution in cities. But unless we do something now, there will be more traffic jams and temperatures will continue to rise, so the problems in our environment will get worse. The bikes might help people to lead a healthier life, too.”

Yours,

Li Hua