A green tool vest (背心) can often be seen in the wardrobe (衣橱) of Wu Yuren, a______professor of physics from Shanghai’s Tongji University. Its many patch pockets are like magic boxes from which Wu pulls small devices when ______lab experiments. At times, she almost resembles a magician pulling a rabbit out of a hat.

A slim figure with silver locks and a lively ______, Wu likes to move around and use her hands when explaining the experiments she does in her videos. ______over 4 million followers on major short video platform Douyin, the 74-year-old has shared more than 400 such videos,______her the nickname “science grandma.” Most of these videos use simple and interesting experiments to illustrate (阐明)______ and difficult physics concepts.This is Wu’s new career path after having taught in a classroom for some 50 years.

In 2018, Wu set up a club together with some other retired physics professors and graduates holding a physics PhD, aiming to ______ the real interest of younger generations in a casual, enlightening (启发性的) and fun ______.

“The digital ______, a tendency that older adults are less adept (擅长) at using and hence less likely to use the Internet than younger people, doesn’t ______ these senior scholars at all,” one netizen ______. “They are more diligent in updating their videos than many of their younger peers. I believe it is their passion for ______ knowledge ______ has become their greatest ______.”

“Viewers of my class are of different ages and come from all over China. Also, they can have live audio chats with me, ask questions and have discussions______,” Wu said, adding “I am now in good physical shape and I will continue doing this until I am too old to do so ”

Learning never gets old.

Bill and Cathy wanted to go on a holiday. They chose a place called Maldives (马尔代夫). And they decided to _________ there for two weeks in spring, because they heard that the weather there was _________at that time. They worked very hard for several months. Finally, they made enough money for their dream _________. But their trip was more like a nightmare (噩梦)!

The problem _________ when the flight was put off because of bad weather. They couldn’t leave _________ night. They finally got on the plane twelve hours later! But they couldn’t fly to Maldives because there was a _________. They had to fly to the capital city _________. There they stayed in a small hotel _________ the airport.

The hotel was next to the sea, but the sea was _________ dirty that they couldn’t __________in it. And the hotel swimming pool was full of leaves! The food was __________, too. For breakfast there was only bread and milk! The worst part was when the storm came, they felt really __________. Because of the __________weather, they had to stay for another night in the small hotel. And they had nothing to do. It was so __________. Finally, they __________ at Maldives three days later. And someone told them the weather there had been wonderful all the time!

An old man found a sparrow (麻雀) with a broken wing. He brought it home and nursed it back to _______ . Afterwards, though it could fly, the sparrow _______ to leave the house. The old man’s wife asked her husband to get rid of the bird as it was _______ the house. But he wouldn’t listen.

One day while her husband was asleep, the woman _______ the sparrow, took it far away from the house, and let it go, warning it never to _______ . The old man missed his little friend and hoped it would come back, _______ it never did. Then one day, several weeks later, he was walking past an old house when he heard a _______ sound. He looked up and there was the _______ , sitting on the gate. The sparrow gave the old man a gold _______ it had found in the house.

The old man did not much ________ money, but his wife was ________ when she saw the coin, and made up her mind to get more from the sparrow. ________ , early the next morning she slipped (溜走) out of the house and made her ________ to the house. When she saw the sparrow, she ________ it to return.

“If you’ve found ________ , bring it along and I’ll spend it all on you,” she promised.

The sparrow brought her an old ________ with the help of its friends. The basket was ________ but the woman did not wait to find out what was in it. She grabbed it and ran, ________ that the sparrow would follow and go to her house again. The moment she reached home, she ________ the basket, expecting it to be filled with gold and silver. Instead, out ________ many sparrows.

The woman spent the rest of her life trying to drive the sparrows out.