QUIZ TIME

day5:I. 根据短文内容，从短文后的七个选项中选出正确的填入空白处。选项中有两项为多余选项。

作者：21st

These days so many things are going digital (数字化), and books are too. People can buy e-books or cheap books online. This means that some bookstores have a hard time staying open. 1. ________________________.

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