24. How does the man deal with people who are insecure?
25. What kind of person is the man in the conversation?
Section B
Directions: In this section, you will hear 3 short passages. At the end of each passage, you will hear some questions. Both the passage and the questions will be spoken only once. After you hear a question, you must choose the best answer from the four choices marked A), B), C) and D). Then mark the corresponding letter on Answer Sheet 2 with a single line through the centre。
Passage One
You can find it orbiting Earth, floating in space, or sitting on Venus, Mars, and the Moon. No, its not a space---its space trash! Space trash, often called space debris, is any man-made object that no longer serves a useful purpose. More than 4,000 satellites have been launched into space since 1957. All that activity has led to large amounts of space trash。
Nicholas Johnson, a chief NASA scientist and program manager for orbital debris, monitors more than 1,300 objects that are at least three to four inches wide. Of those objects, only 600 to 700 are still in use. The oldest piece of space trash is Vanguard 1, the second satellite that the United States launched. Vanguard 1 has been in space since March 1958。
Space trash moves very quickly. According to Johnson, speeds may reach 18,000 miles an hour. Because the trash moves so quickly, even very small pieces can cause damage. Today the trash causes only minor damage to satellites. Thats largely because of measures that NASA and other countries space programs have taken. For example, making sure that no fuel is left on satellites limits the amount of explosions that can send trash hurtling through space。
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