Science and technology is changing fast nowadays. I bought this MP3 player at the beginning of this year but now it's out of ________.
| A．date | B．order | C．use | D．sight |
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30. --- Mrs. Smith, please teach me how to draw on the computer today.
--- Oh, no._______. You have to get familiar with the keyboard first.
| A．It is never too old to learn | B．Think twice before you do |
| C．Learn to walk before you run | D．One today is worth two tomorrows |
29. He told us that the girl was _______, so we went to save her.
| A．dangerous | B．in danger | C．a danger | D．Endangering |
28. Vitamin D helps our bodies make a special chemical, and this special chemical, _______, affects our brains, making us feel happy.
| A．in turn | B．in particular | C．in return | D．in short |
27. Do you know what use people _______ pines after they’re cut down?
| A．make of | B．make into | C．make up of | D．make from |
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