Men have always wondered about the earth they live on and about the ①_____ above them.

    When early men looked at the night sky, they asked themselves a lot of questions. They looked at the moon, and wondered what this strange bright object in the sky was. They did not understand why it changed its shape from night to night. They looked at the stars and planets. They also wondered why some of them changed their positions, while others did not.

    ②他们也思考地球的形状。 Most early people believed the earth was flat.

    ③In different parts of the world, there were different ideas about the universe. The ancient Greeks were the first people to study the universe(宇宙) more scientifically. In the sixth century BC Pythagoras put forward the idea that the world was round. However, he could not explain why people at the bottom of the world did not fall off.

    It was not until the sixteenth and seventeenth centuries that scientists found the answers to some important questions. ④With the help of Galileo's telescope, people could see the sky more clearly, and find the positions of the stars and planets. Finally in 1665, Isaac Newton explained to the world what gravity (重力) was and people at last understood why they did not fall off the earth.

    Dawa Dorji has many jobs: singer, barkeeper and English tour guide, but he is most famous as the lead singer of the first folk(民间的) pop band in Tibet(西藏).

    In 2003, Dawa Dorji met two fans of Tibetan music.{#blank#}1{#/blank#}, and later another two joined the band.

    {#blank#}2{#/blank#}, so they had to practise on weekdays in a small village after work. Dawa Dorji and his band members believed that they needed to communicate with their audience(听众) in order to write good songs. {#blank#}3{#/blank#}.

    At the beginning, most audience were foreigners, but after a couple of months, many local people came to enjoy their music. {#blank#}4{#/blank#}.

    “Whenever there is a festival, we Tibetans sing and dance, I sang songs with the old people, and I learned more about how to sing,” said Dawa Dorji.

    {#blank#}5{#/blank#}, and many of them are from traditional ones.

    Dawa Dorji believes that their efforts(努力) are meaningful for introducing Tibetan folk music to the whole nation, and even the whole world.

⑴{#blank#}1{#/blank#}The students in the USA started to take tree climbing in the 1980s.Now over 100 schools offer tree climbing courses to students in the USA.

⑵{#blank#}2{#/blank#}All primary and middle schools in Hainan will set up swimming courses in 2019.This year the government is busy building swimming-pools for schools-at least one for each town, hoping that every student will be able to swim before they leave school from 2020on.

⑶{#blank#}3{#/blank#}An ice theme can be found at Hotel de Glace in Canada. In winter, you can get a fireplace and a private spa(温泉)in the rooms. The ice hotel has new rooms each year. This winter, it will build a room with the theme of Disney's movie Frozen.

⑷{#blank#}4{#/blank#}My birthday is on April 16th.I will go to the church on my birthday to get blessings(祝福)from my parents and give sweets my friends. I will go for a trip with my parents in our car and have a wonderful birthday.

⑸{#blank#}5{#/blank#}In the beginning of the video, an old man named Li Yubao living in a faraway village asked his grandson on the phone what gifts he wanted for the Spring Festival, but only heard the word "Peppa(佩奇)" because of the poor mobile signal. So, the man begins an interesting journey to discover who Peppa is. With the help of neighbors, the old man made a Peppa model. When his grandson saw it, he was surprised