Remember books？ They were those pieces of paper with words printed on them【C1】______in bet

ween two, sometimes,【C2】______covers. People bought them, and people borrowed them, but,【C3】______people used to read them. And then came screens. Six years into the【C4】______rise of mobile, half of American adults own a smartphone; over a third owns a tablet. Now, Im joking about the end of books, but its easy and tempting to【C5】______that screens will continue their【C6】______on words and paper-bound books will be at the【C7】______of vanishing. But if you take a hard look at the data, its not the end of print. Not by a long shot. 【C8】______years, there hasnt been a more【C9】______technology for capturing the hopes and the fears of new parents than the tablet. Touchscreens are so easy to【C10】______that babies can use them and learn at younger ages than we thought possible—or babies can use them and use them and use them and lose out on other skills. We just dont know what this does【C11】______young brains. All we know is were【C12】______a generation that sometimes finds magazines more【C13】______than iPads. Parents, of course, cant not know. Or, if they really cant, then they dont want to take any【C14】______. And thats why its not at all【C15】______that the vast, vast【C16】______of parents prefer reading printed books to their young children. Pew Research found that 94 percent of parents think its important to read print books to their children. Print【C17】______isnt going away soon.【C18】______more people prefer e-readers, some would still rather read print. Books will become "luxuries". But, of course, the real test will come in the next few years when we see what kids who have been using tablets since before they could walk prefer to read. Print is in a long, slow【C19】______that feels like a death spiral, but isnt quite so. For now, at least, the end of print is a long way off, even if kids these days cant【C20】______how to turn the page.

【C1】

A．sealed

B．contained

C．packed

D．installed