From an early age, Parker always said that he would be an astronaut. But no matter {#blank#}1{#/blank#}much he studied, worked, and took tests, he never passed. Finally, he {#blank#}2{#/blank#} (grow) over the maximum(最高的) age for taking the test. He would never be able to realize his dream.

    People {#blank#}3{#/blank#} ( feel )sorry for his dream. Although he{#blank#}4{#/blank#} (tell) about having to give up his dream, Parker continued training and studying, as though he was going to sit the tests next month.

    He carried this on as he got {#blank#}5{#/blank#} (old), and when he was a very old man he heard that they were doing some very important medical experiments. For those experiments they needed {#blank#}6{#/blank#} very old astronaut. Parker, who now walked with a stick, was the only old man in the whole world who was trained to fly in a rocket.

    So Parker found {#blank#}7{#/blank#}(he) flying in space at last. The experiments were very {#blank#}8{#/blank#} (succeed). The knowledge from the experiments helped doctors to cure one of the {#blank#}9{#/blank#}(bad)sicknesses for old people, and Parker was celebrated as a hero. Photos of the astronaut with a walking stick and no{#blank#}10{#/blank#} (tooth) spread all over the world. It showed  that persistent effort always brings reward, even though that reward may not be in the form we had first expected.

    Building an app is a big project. If you want to build the next great smart phone app alone, you need a plan. First, think about {#blank#}1{#/blank#} to build. Will your app be a game? Will it be for business? Then make a schedule for building {#blank#}2{#/blank#} app. You need plenty of time for researching and getting enough information {#blank#}3{#/blank#} you can build your app.

    Now you're ready {#blank#}4{#/blank#} (start) the app. Building an app is like a puzzle with many different parts, you can build it yourself or find a friend to help you. There are many websites and {#blank#}5{#/blank#} (video) which can teach you to build one. Some websites provide app developers {#blank#}6{#/blank#} "building blocks". As you build one, you pick blocks from the websites and put {#blank#}7{#/blank#} (they) in your app.

    After you build your app, you need to check it {#blank#}8{#/blank#} (careful). Look for bugs. Most apps have several problems to fix. Show your app to people and ask their opinions. Make sure everything {#blank#}9{#/blank#} (work) before letting people download it. There are so many tools that can help you build apps. Having the right tools will make the work much {#blank#}10{#/blank#} (easy). Now almost anyone can make a new app.

    Have you ever heard of friendships among animals? At a zoo in Germany, an unusual friendship {#blank#}1{#/blank#} (develop) between a cat and a bear.

    No one is quite sure how the friendship first began. One day, some {#blank#}2{#/blank#} (worker) in the zoo noticed a black cat was in the bear's cage (笼子),and the two animals were playing together peacefully. They were surprised {#blank#}3{#/blank#} well the small cat seemed to get along with the large bear. The bear keeper allowed the cat to stay with the bear. And later the pair and their unusual {#blank#}4{#/blank#} (become) a hot topic at the zoo.

    After several years, a new cage {#blank#}5{#/blank#} (build) for the bear. However, the cat was still in the same cage, so it walked around {#blank#}6{#/blank#} (angry) and cried to be with the bear. The bear keeper finally took pity on the cat {#blank#}7{#/blank#} let it stay with the bear. The cat and the bear got {#blank#}8{#/blank#} (close) than before. They often sat together and shared meals in {#blank#}9{#/blank#}sun.

    Sometimes it may be natural for animals {#blank#}10{#/blank#} (have) their own ideas about who would make a good friend. These may surprise humans, who usually expect animals to form relationships with others of the same species.