People from other countries will find many different surprising things in Britain. Greek: A man from Greece sees a special way of {#blank#}1{#/blank#} (drive) in Britain, People drive on the left in the British street, {#blank#}2{#/blank#} the British people never feel surprised. The Greek man said, "I've been in Britain {#blank#}3{#/blank#} nearly a month now. But at first, I couldn't always remember to drive on the left. Every time, my friend{#blank#}4{#/blank#} (remind) me. "Japanese: Japanese people can't understand {#blank#}5{#/blank#} British people keep their shoes on at home. In Japan, people walk in the room without shoes. If {#blank#}6{#/blank#} (visit) keep their shoes on in the room in Japan, the Japanese people think they are very {#blank#}7{#/blank#} (polite). Spanish: The Spanish people mind the way that the British people greet each other. They themselves seem {#blank#}8{#/blank#} (be) afraid of touching. When they meet, they just smile or nod but never kiss or hug in Spain. But the British people think kissing is {#blank#}9{#/blank#} usual greeting when they meet! There is an old {#blank#}10{#/blank#} (say), "When in Rome, do as the Romans do." When we go to a foreign country, we should follow the etiquette(礼节) of the country.

    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.