It may be the last book you’ll ever buy. And certainly, from a (21) standpoint, it will be the only book you’ll ever need. No, it’s not the Bible or some New Age tome (22) enlightenment--although it would let you carry (23) both texts simultaneously. It’s an electronic book--a (24) volume that could contain a library of information or, if your tastes run (25) what’s current, every title on today’s bestseller (26) And when you’re (27) with those, you could refill it with new (28) Convenience is its main (29) and that means more than simple portability. Because the information is in electronic (30) , it can be easily manipulated. You could, for instance, make the type larger for easier reading. Or you could make notes in the (31) with a stylus your observations being (32) on tiny, removable flash-memory card in the spine. It is likely that electronic books will come pre-loaded with a (33) of titles. New titles could be made (34) through flash-memory cards, for example, internet will be the delivery method of choice. Imagine browsing an online bookstore like www. Amazon. com, corn and downloading a novel (35) your electronic book via the modem in its spine. (36) Moby Dick would take about a minute. You could download a few titles, so you’ll have a few good reads to choose from while you’re relaxing at the beach. If your first choice is not to your (37) , a new title becomes available (38) the push of a button. An electronic book will be (39) --around ＄ 200 for a basic read-only model to about ＄ 400 for one that would (40) your margin scribbles. Some hurdles remain, though, before you can take an electric book with you anywhere.

A. formula
B. form
C. format
D. formation