阅读下面短文并回答问题，然后将答案写到答题卡相应的位置上（请注意问题后的词数要求）。Apple has entered

阅读下面短文并回答问题，然后将答案写到答题卡相应的位置上（请注意问题后的词数要求）。
Apple has entered the textbook market. The tech giant introduced iBooks textbooks a couple of weeks ago when it announced its iBooks 2 platform.  They are digital books in a variety of subjects from astronomy to zoology taking in science, maths, history and geography. Apple developed its iPad-based textbooks in connection with major textbook publishers. The company offers a collection of textbooks for high school students.
It sounds like good news for pupils and students. Think of it. No more _________________full of textbooks. Every textbook you require can be stored on your iPad. 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. Will digital books take over completely in education? Is learning going to evolve into something we do on an electronic tablet computer? That remains to be seen.
小题1:What’ s the main idea of the text?  (no more than 10 words)
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小题2:Fill in the blank in Paragraph 2 with proper words. (no more than 3 words)
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小题3: What does the underlined word “it” in Paragraph 1 refer to? (no more than 3 words)
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小题4:What are the advantages of iBooks textbooks? (no more than 15 words)
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小题5:Do you think digital books will replace traditional books in the future,why or why not? (no more than 25 words)