In many people's opinion, man's first real invention,{#blank#}1{#/blank#}is also one of the most important inventions in history, is the wheel. All transportation and every machine in the world depend{#blank#}2{#/blank#}it. The wheel is the{#blank#}3{#/blank#}(simple) yet perhaps the most remarkable of all{#blank#}4{#/blank#}(invention) because there are no wheels in nature.{#blank#}5{#/blank#}, then, did man come to invent the wheel? Perhaps some early hunters found that the body of {#blank#}6{#/blank#}heavy animal could be rolled through the forest on logs (圆木) more{#blank#}7{#/blank#}(easy) than they could carry it. However, the logs{#blank#}8{#/blank#}them) weigh a lot.

    It must have taken a great prehistoric thinker to imagine two thin slices of log connected, at their centers by a string stick. This would roll along just {#blank#}9{#/blank#}the logs did, yet be much lighter and easier{#blank#}10{#/blank#}(handle). Thus the wheel and axle came into being and with them the first carts.

—Yes, they took away all the {#blank#}1{#/blank#} there and became rich overnight.

    Two years ago, Jo acted as a teacher in Papua New Guinea. There was no electricity, water or textbooks in the school. When she knew that the students {#blank#}1{#/blank#} (die) to learn chemistry, she tried to show {#blank#}2{#/blank#} (they) chemistry experiments every week. Sometimes, she doubted whether chemistry was relevant{#blank#}3{#/blank#} these students, because most of them would go back to their villages. Actually, they had no{#blank#}4{#/blank#} (person) ambition. The local people had a hard life. Their hut was so dark that it took time for one's eyes {#blank#}5{#/blank#} (adjust). The only possessions {#blank#}6{#/blank#} could be seen were one broom, a few tin plates and cups and a couple of jars. They didn't speak much of the local English dialect. When {#blank#}7{#/blank#} (sit) around, she loved listening to them softly talking to each other in their language{#blank#}8{#/blank#} (occupy) with teaching, she had no time for social{#blank#}9{#/blank#} (activity). Instead, she often joined in their family party. She felt it was {#blank#}10{#/blank#} privilege to spend a day with them.

    Examinations are of great{#blank#}1{#/blank#}(important) in Chinese schools and universities, so millions of the students take part in them every year. Almost all the students{#blank#}2{#/blank#}(teach) from an early age to understand the nature of examinations. It is true that some students can pass an examination{#blank#}3{#/blank#}(easy) than others, although it doesn't mean they are better with their study.

    Quite a few students are afraid of examinations though they master {#blank#}4{#/blank#}they have learned very well. Sometimes the fear of examinations comes from pressure.

    People think pressure is good for students{#blank#}5{#/blank#}it can make the students{#blank#}6{#/blank#}(try) harder and make some school work more challenging. But too much pressure may even cause diseases {#blank#}7{#/blank#}will influence students' academic performance badly.

    No student succeeds {#blank#}8{#/blank#}hard work. If one spends little little{#blank#}9{#/blank#}(work) on their lessons every day, they can't expect {#blank#}10{#/blank#}good result at the end of the term. Developing study skills can get students to learn better and to pass examinations with ease if they understand the lessons and the work involved.

    The Great Wall was listed as a World Heritage by UNESCO in 1987. Just like a dragon, it winds up and down across deserts, grasslands and mountains,{#blank#}1{#/blank#}( run) approximately 21,196 kilometers from east to west.

    The{#blank#}2{#/blank#}( construct) of the Great Wall was not that easy, {#blank#}3{#/blank#}drew heavily on the local resources for building materials. The walls were{#blank#}4{#/blank#}( original) built in the Spring & Autumn Period and the Warring States Period. Emperor Qin Shi Huang succeeded in his effort to have them joined together. Since then, the Great Wall{#blank#}5{#/blank#}( serve) as a monument of the Chinese nation throughout history.

    With {#blank#}6{#/blank#}history of about 2,700 years, some parts of the Great Wall are now {#blank#}7{#/blank#}ruins or have disappeared. However, the Great Wall of China is still one of the most appealing{#blank#}8{#/blank#}(attraction) all around the world owing to its historical significance. The best-known part of the Great Wall of China, Badaling, {#blank#}9{#/blank#}(locate) 43 miles northwest of Beijing, attracts thousands of national and foreign tourists every day.

    Today, the Great Wall{#blank#}10{#/blank#}(recognize) as one of the most important impressive architectural achievements in history.