Chinese writing began thousands of years ago. According {#blank#}1{#/blank#} an ancient story, a man named Cang Jie invented Chinese writing. One winter day while he was hunting, he saw the {#blank#}2{#/blank#}(track) of animals in the snow and {#blank#}3{#/blank#}(observe) that the appearance of each one was different. Then {#blank#}4{#/blank#}he got was that he could use different shapes {#blank#}5{#/blank#}(represent) different objects. The {#blank#}6{#/blank#}(one) Chinese characters were drawings of physical objects. Some characters {#blank#}7{#/blank#}(simplify) and others have been made {#blank#}8{#/blank#}(difficult) over time.{#blank#}9{#/blank#}, as a whole, the characters have {#blank#}10{#/blank#}(gradual) developed from drawings into standard forms.

    The morning had been a disaster. My tooth was aching, and I {#blank#}1{#/blank#}(be) in an argument with a friend. Her words still hurt：“The trouble with you is {#blank#}2{#/blank#} you won't put yourself in my place. Can't you see things from my point of view?” I shook my head{#blank#}3{#/blank#}(stubborn)—and felt the ache in my tooth. I'd thought I could hold out till my dentist came back from holiday, {#blank#}4{#/blank#}the pain was really unbearable(难以忍受的). I started calling the dentists in the phone book, but no one could see me immediately. Finally, at about lunchtime, I got lucky.

    “ {#blank#}5{#/blank#} you come by right now,” the receptionist said, “the dentist will fit you in .”

     I took my purse and keys and rushed to my car. But suddenly I began to doubt {#blank#}6{#/blank#}the dentist. What kind of dentist would be so eager to treat someone at such short notice? Why wasn't he as busy as the {#blank#}7{#/blank#}?

    In the dentist's office, I sat down and looked around. I saw nothing but the bare walls and I became even more {#blank#}8{#/blank#}(worry). The assistant noticed my nervousness and placed her warm hand over my ice-cold one.

    When I told her my fears, she laughed and said, “Don't worry. The dentist is very good.”

“How long do I have to wait for him?” I asked impatiently.

    “Come on, he is coming. Just lie down and relax. And enjoy the artwork,” the assistant said.

“The artwork?” I was puzzled.

    The chair went back, suddenly I smiled. There was a beautiful picture, right where I could enjoy {#blank#}9{#/blank#}：on the ceiling. How considerate the dentist was！At that moment, I began to understand what my friend meant by {#blank#}10{#/blank#}words.

    What a relief！

    I have even wondered if money buys happiness. It seems that money will allow me to buy the things {#blank#}1{#/blank#}make me happy. But one day I sat down and made a list of the things I wanted{#blank#}2{#/blank#}(do) in my life. I realized I'd never put much thought into it. I'd written down these things —like taking a photo on the mountain and staying at a hotel in Dubai, but I didn't really plan to do it, {#blank#}3{#/blank#} (simple) because I didn't have the time.

    My life consisted {#blank#}4{#/blank#} heading to the office, running on the road, working some more …It didn't matter if my salary doubled; the life would stay {#blank#}5{#/blank#}same. Sure I'd probably drive a {#blank#}6{#/blank#} (nice) car, move into a bigger place, and have a bigger TV than my friends, but that wasn't helping me realize any of my goals. Six months after{#blank#}7{#/blank#} (create) that list, my belief has changed. I'd keep working on my list, for {#blank#}8{#/blank#} (experience) were much more important than any of the material items. It's not hard to create opportunity for {#blank#}9{#/blank#} (you). All it {#blank#}10{#/blank#} (take) is a little creative thinking.

    The Moon's near side, the one we all see, has been the target of many robotic and human missions. However, its far side, also {#blank#}1{#/blank#} (call)the dark side because it faces away from the Earth and little {#blank#}2{#/blank#} (know)about it, has never been explored. That changed on Jan.2, 2019, when Chinese spacecraft Chang'e 4 made a soft landing on {#blank#}3{#/blank#} is often referred to as the dark side.

    The landing is {#blank#}4{#/blank#} example of China's growing desire {#blank#}5{#/blank#} (compete)with the American, Russian and European space programs. China also wants to {#blank#}6{#/blank#} (strength)its position as a regional and international power.

    One of the great {#blank#}7{#/blank#} (difficulty)in exploring the far side of the Moon is that it blocks all radio signals, {#blank#}8{#/blank#} (make)it impossible to communicate with the Earth. To overcome this difficulty, in 2017, the Chinese National Space Administration launched a satellite to orbit the Moon and relay the signals. Once a {#blank#}9{#/blank#} (rely)communication path was in place, Chang'e 4 could send back information.

    Chang'e 4 will make astronomical observations and examine the structure and mineral composition of the ground above and below the surface, {#blank#}10{#/blank#} researchers believe will provide insights into the solar system's early days and perhaps even the origin of the first stars.

    It was getting dark when I got home. It was cold and I {#blank#}1{#/blank#}(wear) a coat. I walked up to the door and put my hand into my pocket {#blank#}2{#/blank#}(take) out my key {#blank#}3{#/blank#} I couldn't find it. I suddenly remembered that I {#blank#}4{#/blank#}(leave) it on my desk in the office. It really didn't make any difference. I knew my wife {#blank#}5{#/blank#}(be) at home and the children must have come back from school by now, so I {#blank#}6{#/blank#}(knock) at the door.

    There was no answer, so I knocked again. I continued knocking at the door for some time. I {#blank#}7{#/blank#}(get) angry. Then I remembered something the office boy had told me at noon. He said that my wife {#blank#}8{#/blank#}(phone) saying that she {#blank#}9{#/blank#}(go) shopping in the afternoon with the children.

    There was only one thing for me to do: I had to climb in {#blank#}10{#/blank#} a window.