Journey to the Center of the Earth spoke of a trip to the centre of the earth through a volcano in Iceland. When Professor Otto Lindenbrock，his nephew and the guide they hired {#blank#}1{#/blank#}(reach) the volcano， they journeyed underground through a small cave. After many days， they came to a vast room {#blank#}2{#/blank#}a large ocean inside. The three men built a small boat and set sail.{#blank#}3{#/blank#} (sudden)， two dinosaurs rose to the surface and began to fight each other. The small boat was almost sunk by the dinosaurs {#blank#}4{#/blank#}they were able to get away.

They sailed to shore and explored the forest. They came across huge insects and many strange {#blank#}5{#/blank#}(creature). As they were wandering around， they noticed a man sitting against a tree in the {#blank#}6{#/blank#}(distant)—he was at least four meters tall. The men became afraid， and ran back to the boat.

The boat floated down with the water {#blank#}7{#/blank#} they could only hold on to the boat in terror. Finally， they reached the bottom of the hole. Then the water began to push them up. They floated upwards for miles. The water rushed beneath them， {#blank#}8{#/blank#}(push) them out into the sunlight. They now found {#blank#}9{#/blank#}(they) in a volcano in Italy—their adventure was over，but a new one was about {#blank#}10{#/blank#}(begin).

    Throughout modern history, perhaps there has never been a scientist as iconic (偶像的) as Stephen Hawking.

    Whether he{#blank#}1{#/blank#}(educate) the world with his knowledge of the universe, or making fun of himself in TV shows, it is hard to imagine what the world will be like now Hawking is no longer in.

    On March 14, 2018, the British physicist passed away in Cambridge. Since then, many people have expressed their condolences (哀悼) on social media, including British computer scientist Tim Berners-Lee{#blank#}2{#/blank#}invented the World Wide Web. “We have lost a great mind and a wonderful spirit,” Berners-Lee wrote.

    Hawking was an icon for many reasons, but he will be best remembered {#blank#}3{#/blank#} his work in the field of science.

    Building on German scientist Albert Einstein's work, Hawking explained his belief that space{#blank#}4{#/blank#} (start) with the Big Bang, and will end with black holes.

“This complete set of laws can give us the {#blank#}5{#/blank#} (answer) to questions like 'How did the universe begin?'” Hawking wrote in his 2010 work The Grand Design. “Where is it going and will it have an end? If so, how will it end?”

    Besides his work in science, he also managed to overcome many difficulties in his personal life. While{#blank#}6{#/blank#} (study) at Cambridge University, he was diagnosed with motor neuron (运动神经元) disease at the age of 21. His {#blank#}7{#/blank#} (ill) left him paralyzed and he was told he only had a short time to live. However, he went on to become one of the{#blank#}8{#/blank#} (great) minds the world has ever known.

    “I felt it was unfair. Why should this happen to me?” he once recalled. “At the time, I thought my life was over and that I would never realize the potential I felt I had. But now, 50 years later, I can be satisfied with my life.”

Hawking left behind a great legacy (遗产). His signature book A Brief History of Time: From the Big Bang to Black Holes{#blank#}9{#/blank#}(publish) in 1988, became one of the world's best-selling science publications. And in 2014, UK actor Eddie Redmayne played Hawking in the movie The Theory of Everything, which tells the tale of the physicist's life.

    He may no longer be with us{#blank#}10{#/blank#} Hawking will continue to inspire the world for generations to come. As he once said himself, “Look up at the stars and not down at your feet!”

China's Chang'e 5 mission successfully delivered samples(样本)of moon rock and dust to Earth on December 17, 2020. It{#blank#}1{#/blank#}(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{#blank#}2{#/blank#}a little after 2：00 a. m. Recovery teams in trucks and helicopters located the landing site shortly after and secured the sample{#blank#}3{#/blank#}(contain).

While Apollo-era moon rocks are estimated to be about 3 to 4 billion years old, the material{#blank#}4{#/blank#}(collect) by Chang'e 5 is from a site in the northwest region of the moon's near side. This area was formed{#blank#}5{#/blank#}(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{#blank#}6{#/blank#}(planet)and moons(卫星).

The Chang'e lunar program, {#blank#}7{#/blank#}includes landing two lunar rovers(月球车)on the moon's surface, has been{#blank#}8{#/blank#}(remarkable)successful. Although Chang'e 5 was a short mission, it's one of{#blank#}9{#/blank#}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{#blank#}10{#/blank#}(launch) in 2023 or 2024.