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ection B 1a— 1d) B. With Great Photo you will start learning photography by practicing with the help of③interactive lessons, you will gradually gain understanding of the art of photography. C. Discover the world with Google Maps. It is a great helper when you are travelling. (Section B 1a— 1d) Experience Street View, 3D Mapping, turnbyturn directions, indoor maps and more through your devices. D. Hello English is used by④ more than 30,000, 000 English learners. This app focuses on helping you master reading, writing,speaking and listening skills besides building your vocabulary. (Section B 1a— 1d) E. Vista is an app for you to lea