Compared with ordinary books, e-books have many advantages. First of all, e-books save space. You can put as many as 10 books into a thing no bigger than a pocket radio and then carry it everywhere. You can renew reading materials in your e-book as many times as you like. With the development of e-book technology, probably an e-library will appear. Then you just take your e-books there and download what you want to read. You no longer need to worry about whether your books are over-due or not.
根据短文内容，选择可以完成句子的最佳答案。
1. E-books are ________.
A. electronic books
B. no larger than an ordinary book
C. very popular in big city
D. A, B and C
2. First, you ________.
A. call up websites on your computer
B. read books that you want
C. turn on your e-book
D. download the books you like
3. You can download ________ books at a time.
A. two B. ten C. twelve D. twenty
4. E-books ________.
A. save space B. save money
C. look like a pocket radio D. carry it easily
5. There must be an ________ in the future.
A. e-book B. e-mail C. e-library D. e-house
B
Eager to open up a space tourism market, a Russian company presented a “space place” model. It would give tourists the chance to spend an hour in space.
Anybody who can pay about $100,000 would be able to experience zero gravity. About 100 people have already booked seats to fly on the C-21 plane. The US company helped the first space tourist, Dennis Tito, to secure his flight to the International Space Station. Tito is said to have paid $20 million for the eight-day trip. C-21 would offer tourists a small glimpse of space. The aircraft, carrying a pilot and two passengers, will be positioned on top of a carrier airplane until it is 17,100 metres in the air. Once released from the carrier, the ship’s own rocket will send it to a height of over 96 kilometers for three minutes of weightlessness. Then C-21 will slide back into the atmosphere and land like an ordinary plane. The entire flight will only take about an hour.(from www.zkenglish.com)
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