题目内容：

A quick look at an e-reader

New, High-Contrast（高对比度） E-Ink Screen

50% better contrast than any other e-reader. The clearest text and sharpest images.

Read in Bright Sunlight

Unlike LCD screens, its screen reads like real paper, with no glare. Read as easily in bright sunlight as in your living room.

Lighter Than a Paperback

Weighing only 8.5 ounces and 1/3 of an inch thick, it is lighter than a paperback and thinner than a magazine.

Holds 3,500 Books

We doubled its storage so you can carry up to 3,500 books.

Battery Life of Up to One Month

A single charge lasts up to one month with wireless off. Keeping wireless always on, it can go for up to three weeks without recharging.  

Books in 60 Seconds

With fast, free wireless delivery, you can start reading books in less than 60 seconds. No computer required.

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Over 670,000 books, including 107 of 111 New York Times Best Sellers, plus audiobooks, periodicals and blogs. For non-U.S. customers, content availability varies.

Free, Out-of-Copyright Books

Over 1.8 million free, out-of-copyright, pre-1923 books are available such as Pride and Prejudice.

Low Book Prices

Over 550,000 books are $9.99 or less, including 73 New York Times Best Sellers of the present time.

Free Book Samples (样品)

Download and read first chapters for free before you decide to buy.

 

1.If you want to use the e-reader longer, you should ______.

    A. charge it frequently          B. keep wireless off

    C. use it in bright sunlight     D. read in a quiet room

2.Which of the following can best fill in the blank in the text?

    A. Large selection.     B.Excellent service.

C. Reasonable prices.   D.Interesting content.

3.What is this text，mainly about?

A.What an e-reader is.

B.Who needs an e-reader.

C.How to use an e-reader.

D.The advantages of an e-reader.