China's Chang'e 5 mission successfully delivered samples(样本)of moon rock and dust to Earth on December 17, 2020. It    1    (mark)the first time in 4 years that moon rocks have been brought back to our planet, since the Soviet Union's I.una 24 mission in 1976.

The sample capsule landed in Inner Mongolia    2    a little after 2：00 a. m. Recovery teams in trucks and helicopters located the landing site shortly after and secured the sample    3    (contain).

While Apollo-era moon rocks are estimated to be about 3 to 4 billion years old, the material    4    (collect)by Chang'e 5 is from a site in the northwest region of the moon's near side. This area was formed    5    (late), and the rocks here are thought to be only about 1.2 billion years old. That means scientists could learn more about the evolution of the moon and test out new techniques for estimating the age of geological samples from other    6    (planet)and moons(卫星).

The Chang'e lunar program,     7    includes landing two lunar rovers(月球车)on the moon's surface, has been    8    (remarkable)successful. Although Chang'e 5 was a short mission, it's one of    9    most complex projects undertaken by the Chinese space program so far. The country is far from done with the moon—Chang'e 6, a second lunar sample return, is scheduled    10    (launch)in 2023 or 2024.

I was a single mother in my 30s who lived down and out with my daughter Peggy in a small apartment, struggling hard to make our needs meet.

One day, I headed to the downtown for an interview. I sat down in the streetcar, and there against the seat was a beautiful silk umbrella with a silver handle decorated with gold scrolls, among which there was a name carved.

On impulse(冲动) I determined to find the owner myself. I got off the streetcar in the heavy rain and thankfully opened the umbrella to protect myself. Then I searched a telephone book for the name, I found it immediately and called it, waiting patiently, and then a lady answered.

"Yes, “she said in surprise, with extreme excitement." It was my umbrella which had been stolen a year ago.”

So appealing was her pleasure that I forgot I was looking for a job and went directly to her small house. She took the umbrella, with teary eyes, explaining with choking voice that the umbrella was given by her parents, now dead, Her happiness at retrieving(找回)this special possession was such that to have accepted her reward would have spoiled something, so I refused her offer and left.

The following months were hard. I can only obtain temporary employment, for a small salary. What was worse, I had just lost my last job before Christmas, with only fifteen dollars left. Unless a miracle happened, I would be homeless in January, foodless and jobless. I had prayed steadily for weeks, and there had been no answer but this coldness and darkness.

The air was full of Christmas merriment, with the bells ringing and children shouting in the bitter dusk of the evening. But there should be no Christmas for me, I knew, no gifts, no remembrance whatsoever.

Thinking of this, I couldn’t control my tears on my way home, but I managed a smile so could greet my little daughter. She opened the door for me and threw herself in my arms, screaming joyously and demanding desirably for her Christmas gift. There I stood, frozen, overwhelmed by misery.

Suddenly, the doorbell rang and Peggy rushed to answer it, calling that it must be Santa Claus.

Suddenly, a note attached to one package caught my eyes.

4 . Today was Mother’s Day. The young woman was feeling a little ______ because she was 800 miles away from her parents.

In the morning she called her mother to ______ her a happy Mother’s Day and her mother told her about the beautiful lilacs (丁香花) in their garden.

Later that day, she told her husband how she ______ those lilacs in her parents’ garden. “I know where we can find some,” he said. “Get the ______ and come on.” So off they went, ______ down the country roads. There on a small hill were a lot of colorful lilacs. The young woman ______ over and buried her face in the flowers, ______ and enjoying them. Carefully she ______ a few and went back to the car.

On the way home the woman held her flowers, ______ all the way. When they were passing a ______, the young woman saw an old granny sitting alone in a wheelchair at the gate.“______!” she said to her husband. Getting off the car, she quickly walked up to the granny and put the ______ in her hands. As their car pulled away, the old granny ______ with a smile and held the lilacs tightly (紧紧地).

When the young mother sat back to the car, her kids asked her ______, “Who is that old granny? Why did you give her ______ flowers?” “I don’t know her. It is Mother’s Day, and she seems so ______ while I have all of you. I believe those flowers ______ much to her.” The kids nodded with ______, looking rather happy.

Now, every Mother’s Day my kids will go to that small ______ and pick some lilacs for me and that old granny. I’m glad that my small act of ______ has a good effect on my kids.

5 . When you walk through the doors of Morton Plant Hospital on an early Tuesday afternoon,you’ll be greeted by the comforting voice of Mary Ellen Owens.

Owens, who is now 98, started _______at the hospital after her husband died nearly 20 years ago. “ My husband was a ( n) _______here, off and on for about six weeks over four years, ” she _______. “ Everyone at the hospital had been so good to us when he was sick. ” To show her _______, Owens wanted to give back in a big way. “ I don’ t have several million dollars, but I can give my _______, ” she said.

Owens is approaching 7, 000 hours in volunteer time. “ I used to give three days a week,”she said. “ Now I’ m _______. So I don’ t get around as much as I _______, so I only give one day a week. ”

To get to her weekly four-hour _______, Owens receives a ride from a volunteer who she now calls her friend. “ Every _______, Richard picks me up from my home and brings me here, ”she said. “ I don’ t believe people of my age should be ___________. ”

In her younger years, Owens used to walk up and down the fashion runways in New York City and Richmond, Virginia. She also had a( n) __________to be in the 1939 film classic Gone with the Wind. Because she had other work at the time, however, Owens _________to turn it down.

“ What I didn’ t do in my life is more __________ than what I’ ve done” , she laughs. __________ she’ s in her golden years, Owens plans to continue to live her life with __________by greeting each patient with a smile.

6 . Once there was a piano player in a bar. People came just to hear him play. But one night, a lady asked him to sing a song.

I don’t sing, “said the man.

But the lady told the waiter, “ I’m tired of listening to the piano. I want the player to sing! “

The waiter shouted across the room,” Hey,friend! If you want to get paid,sing a song!” So he did. He had never sung in public before. Now he was singing for the very first time! Nobody had ever heard the song Mona Lisa sung so beautifully!

He had talent he was sitting on! He may have lived the rest of his life as a no - name piano player in a no - name bar. But once he found, by accident，that he could sing well,he. went on working hard and became one of the best - known singers in the   US. His name was Nat King Cole.

You,too,have skills and abilities. You may not feel that your talent is great,but it may be better than you think. With hard work, most skills can be improved. Besides, you may have no success at all if you just sit on your talent.

7 . Alida Monaco doesn’t spend her summers doing the usual teenage work, like working at the mall. Instead，she ‘ s studying.

It used to be that a summer job was considered a teenage thing. Today, Monaco ,who has never had a summer job, is part of growing trend (趋势)teenagers focusing on their studies, even during the summer. That’s down from 72% of Americans aged 16 to 19 who worked in July of 1978, according to the U. S. Bureau of Labor Statistics.

Fierce (激烈的)competition, older workers returning to the workforce and weak economic growth are all adding to the decrease of teenagers in the workforce. But as schoolwork grows increasingly heavy and homework eats up more time, data suggest the biggest reason why some teens won’t be working this summer is that they simply don’t1 have time.

For college - bound teens, some teachers even advise students not to waste time on a summer job. “ Some of my students only have about six weeks off in the summer,” said Shannon Reed, a lecturer at the University of Pittsburgh and a former high school English teacher.” I could never advise that they get jobs during that short break. ”

Young people who don’t work may miss out on valuable skills that they’11 need control and help people learn to deal with adult situations. But Monaco, who plans to attend Harvard, isn’t fazed by her lack(缺乏)of work experience. “Maybe I have missed out on a couple of life skills, “she said. “ But I don’t think it will harm me in way .”

8 . When I was in fourth grade, I worked part-time as a paperboy. Mrs. Stanley was one of my customers. She’d watch me coming down her street, and by the time I’d biked up to her doorstep, there’d be a cold drink waiting. I’d sit and drink while she talked.

Mrs. Stanley talked mostly about her dead husband, “Mr. Stanley and I went shopping this morning.” she’d say. The first time she said that, soda(汽水) went up my nose.

I told my father how Mrs. Stanley talked as if Mr. Stanley were still alive. Dad said she was probably lonely, and that I ought to sit and listen and nod my head and smile, and maybe she’d work it out of her system. So that’s what I did, and it turned out Dad was right. After a while she seemed content to leave her husband over at the cemetery(墓地).

I finally quit delivering newspapers and didn’t see Mrs. Stanley for several years. Then we crossed paths at a church fund-raiser(募捐活动). She was spooning mashed potatoes and looking happy. Four years before, she’d had to offer her paperboy a drink to have someone to talk with. Now she had friends. Her husband was gone, but life went on.

I live in the city now, and my paperboy is a lady named Edna with three kids. She asks me how I’m doing. When I don’t say “fine”, she sticks around to hear my problems. She’s lived in the city most of her life, but she knows about community. Community isn’t so much a place as it is a state of mind. You find it whenever people ask how you’re doing because they care, and not because they’re getting paid to do so. Sometimes it’s good to just smile, nod your head and listen.