For several billion years after the "Big Bang", the earth was still just a cloud of dust. What it was to {#blank#}1{#/blank#} was uncertain until between 4.5 and 3.8 billion years ago when the dust settled into a solid globe. The earth became so {#blank#}2{#/blank#} that it was not clear whether the shape would last or not.

     {#blank#}3{#/blank#} eastward, you'll pass mountains and thousands of lakes and forests, as well as wide rivers and large cities. Some people have the idea {#blank#}4{#/blank#} you can cross Canada in less than five days, but they forget the fact that Canada is 5500 kilometers from coast to coast. Here in Vancouver, you're in Canada's warmest part. People say it is Canada's most beautiful city. {#blank#}5{#/blank#} by mountains and the Pacific Ocean. Its population is increasing rapidly. The coast {#blank#}6{#/blank#} of Vancouver has some of the oldest and most beautiful forests in the world.

    However, this was not easy. When they first arrived in Gombe in 1960, it was unusual for a woman to live in the froest. {#blank#}7{#/blank#} after her mother came to help her for the first few months {#blank#}8{#/blank#} she allowed to begin her project. Her work changed the way people think about chimps. For example, one important thing she discovered was that chimps hunt and eat meat. Until then everyone {#blank#}9{#/blank#} thought chimps ate only fruit and nuts. She also discovered how chimps communicate with each other, and her study of their body language helped her {#blank#}10{#/blank#} their social system.

    In the closing ceremony of the Olympic Winter Games PyeongChang 2018  China put on {#blank#}1{#/blank#} eight-minute performance "See You in Beijing in 2022", {#blank#}2{#/blank#} (direct) by Zhang Yimou. The show centered on the talents of a team of 24 roller-skating {#blank#}3{#/blank#} (perform) from Beijing Sport University. Two of {#blank#}4{#/blank#} (they) dressed up as "Panda Captains" led the performance. It reviewed China's ancient times, {#blank#}5{#/blank#} (show) the country's rich cultural heritage (遗产) and singing the present as well as the future. In addition to {#blank#}6{#/blank#} (tradition) symbols including the Great Wall, the Chinese Dragon and the Chinese phoenix(凤凰), the performance also showed the recent achievements in science and technology {#blank#}7{#/blank#}has been made in China . Towards the end of the performance, the Olympic rings {#blank#}8{#/blank#} (appear) on the stage, as well as images of a global village, children's smiling faces, olive branches and plum blossoms(梅花), which represented China's promise {#blank#}9{#/blank#} (promote) global peace and build a better future for mankind. Finally, the skaters travelled a path to draw the "Winter Dream" sign of the Olympic Winter dreams Beijing 2022. The performance {#blank#}10{#/blank#} (successful) sent China's goodwill and invitations to the world for Beijing 2022.

    A Florida boy who called 911 because he was lonely has now made friends with a kind-hearted police officer.

    Tallahassee police officer Joe White responded {#blank#}1{#/blank#} a call made by a six-year-old boy. While there {#blank#}2{#/blank#} no emergency at the house, White said the child was upset and told him he was lonely.

    "It took Officer White some time {#blank#}3{#/blank#}(explain) how 911 is used and how it's for emergencies," read a post on the Tallahassee Police Department's Facebook page. "Then Officer White said he'd always to be a friend!"

    In addition to {#blank#}4{#/blank#}(give) the child a lesson on the proper use of 911, White gave the child a stuffed animal and let him sit in his car.

    Since the heart-warming story was shared on Facebook, it {#blank#}5{#/blank#}(attract) hundreds of comments from people {#blank#}6{#/blank#}(touch) by the tale.

    "It's such {#blank#}7{#/blank#} extraordinary story! I really admire Officer White for being just what this young man needed—a friend. And it's also a great opportunity for a learning experience—the {#blank#}8{#/blank#}(important) of using 911 properly. What White has done {#blank#}9{#/blank#}(positive) influences those {#blank#}10{#/blank#} have been inspired by this story. I hope they will keep up the friendship," wrote Jean Smith