Apple has entered the textbook market. The tech giant（科技巨头） introduced iBooks textbooks a couple of weeks ago when it announced its iBooks 2 platform. They are digital books in many subjects taking in science, maths, history and geography.
Apple developed its iPad-based textbooks in conjunction with（连接）major textbook publishers. The company offers a collection of textbooks for high school students.
Apple says it offers a “new textbook experience” and suggests its iBooks textbooks are “the next chapter in learning”. It sounds like good news for pupils and students. Think of it. No more carrying heavy backpacks full of textbooks. Every textbook you require can be stored on your iPad. No more having to buy expensive textbooks which you will only use for a year or two and then sell or give away.
Of course there’s a catch. You need to own an iPad and as you know, it is not cheap. You also need to buy digital textbooks, mostly priced each at $14.99 (94.74 yuan) or less. Textbook publishing was worth $ 8.7 billion in the US alone last year. And the rest, as they say, is history. Will Apple revolutionize learning? Will digital books take over completely in education? That remains to be seen.
What is the best title of the text?

A．Apple Enters New Market

B．A Different Way of Learning

C．Experience Digital Texbooks

D．Say Good-bye to Tradition

iBooks textbooks will do good to pupils and students because ________.

A．they are free to get	B．they are easy to carry
C．they are ipad-based	D．they are favorite gifts

The underlined words “a catch” in Paragraph 4 are closest in meaning to “________.”

A．an advantage	B．a surprise
C．a problem	D．an order

What can we know from that last paragraph?

A．iPad-based textbooks have changed our learning.

B．Traditional textbooks will be replaced sooner or later.

C．Apple has earned a lot from the textbook market.

D．Digital books have disadvantages and advantages.