(三)
        If you want to build the next great smartphone app, you need a plan. First, think about the kind of app that you want to build. Then make a schedule for building the app.
        Building an app is like a puzzle with many different parts. You can build it yourself or find a company to help you.
        After you build your app, you need to check it carefully. Look for bugs. Most apps have several problems to fix. Show your app to people. Ask their opinions. Make sure everything works before letting people download it . There are so many tools that can help you build apps . Now almost everyone can make a new app.
【題組】47.In the article, after building the app what should you do?
(A)Sell it to your friends.
(B) Put it online to download.
(C)Check it for problems.
(D) Start building a new one.