单项选择题
A．you can read an ebook on a laptop when you travel B．you can order an ebook using the Ebook Reader C．the ebooks ordered have to be shipped to you D．it takes a lot of trouble reading an ebook
A．One piece. B．Two pieces. C．Three pieces. D．Four pieces.
A．reading an ebook you’ve downloaded B．turning a print book into a digital version C．downloading an ebo0k from the Internet D．copying an ebook onto a portable computer