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.

    Parkour（跑酷）is a sport which trains people to deal with any physical obstacles in their path. It is not a competition but a physical training. A person joining in parkour is called traceur. Traceurs run along a path and use only their bodies to deal with the obstacles in the most efficient way. Parkour pays more attention to efficiency{#blank#}1{#/blank#}(make) it different from the similar practice of free running. Parkour{#blank#}2{#/blank#}(common) includes running, jumping, climbing, rolling and other similar types of physical movements. Many teenagers think that parkour is quite {#blank#}3{#/blank#} cool sport. They have great interest in it.

    The {#blank#}4{#/blank#}(invent) of parkour can't {#blank#}5{#/blank#}(give) to one person because many people have worked on it. A French officer developed the earlier form of parkour. The term “parkour” was first introduced by David Belle and Sebastiar Foucan in the early 1980s{#blank#}6{#/blank#} that time, they were two teenagers. This sport {#blank#}7{#/blank#}(become) more popular in the1990s when many films were made on it.

    {#blank#}8{#/blank#} makes parkour different from other sports is its power to bring people together. It allows traceurs to forget the {#blank#}9{#/blank#}(society) and other problems, and makes a large group work and grow together instead of competing with each other. People can benefit from parkour as it can make them stronger. Still, it also influences one's thought process by improving self-confidence and critical-thinking skills. In this way, parkour allows one to deal with {#blank#}10{#/blank#}(difficulty) in daily life if he or she deals with them through parkour.

David will never forget what happened to him the day before yesterday. He was eating something at home{#blank#}1{#/blank#} he received a strange phone call from a hospital. The caller said that his son{#blank#}2{#/blank#}(fall) to the ground unconscious on the way to school. It was he {#blank#}3{#/blank#}took him to the hospital. David hung up his cell phone and rushed to his son's classroom, only to find him listening to the teacher attentively. He suddenly realized that he had been cheated, but he felt {#blank#}4{#/blank#}(relieve). Just at that time the phone rang again, saying, "Your son is in great danger and he needs {#blank#}5{#/blank#}immediate operation which costs 48,000 yuan. The doctors here say they will not operate {#blank#}6{#/blank#}your son until they receive the money." When{#blank#}7{#/blank#}(ask) from where the caller had taken his son to hospital, the caller rang off. David gave a big smile and said. "What a pity!"

If the cheater thought he could get money from David in such a（an）{#blank#}8{#/blank#}(honest)way, he was wrong. Such phone calls are common these days. A few of them might have fallen victims to such tricks. Most parents are sensitive to {#blank#}9{#/blank#}. It was really silly to cheat well—educated men like David.

    Believe it or not, it's a true story. The{#blank#}10{#/blank#}(colleague)in his office can confirm it, such as Tom, Peter and so on.

    We use flowers as messengers to say something we might have trouble {#blank#}1{#/blank#} (say) directly ourselves. Over time flowers have come to symbolize the most {#blank#}2{#/blank#} (power) human experiences: beauty, love, hope, and rebirth. Sweet flowers alone can say what one {#blank#}3{#/blank#} (fear) expressing. We've listed some of the most famous flowers that have an important meaning. In Mao Zedong's poem Ode to Plum Blossom《咏梅》, the plum blossom was used {#blank#}4{#/blank#} (praise) soldiers who sacrificed their lives for Chinese people. {#blank#}5{#/blank#} great Chinese poet Li Bai from the Tang Dynasty once compared Yang Yuhuan's beautiful face {#blank#}6{#/blank#} blooming peonies (牡丹). Flowering in May, peonies' large petals and strong colors are linked to prosperity (成功) and richness. The orchid (兰花) is well known because {#blank#}7{#/blank#} (it) delicate smell attracts lots of people. Beautiful articles and poems {#blank#}8{#/blank#} (call) “lanzhang” by Chinese people in traditional Chinese culture. Roses, of course, have the most colorful meaning among all the flowers. Red roses mean “I love you.” A red rose, rather than yellow roses, acts as the traditional romantic gift{#blank#}9{#/blank#} (give) to your love on Valentine's Day. Sending yellow roses can be risky, as they represent either friendship {#blank#}10{#/blank#} envy.