B. Because they have actually found alien life out in the universe.
C. Because many people don’t think there’s life beyond the earth.
D. Because scientists are more confident than ever that life does exist out in the universe and want to find them.
2. What can we infer from Paragraph 2?
A. Life can exist in any place.
B. Life can exist in extremely terrible conditions.
C. Nothing can live in a more terrible condition than bacteria in the universe.
D. Life can only live in the biosphere.
3. Who plays an important role in searching of life?
A. Bada.
B. Miller.
C. Kaufman.
D. Onstott.
4. According to Paragraph 4, which of the following is TRUE about the existence of life?
A. There’s life on Earth-like planets.
B. There’s a doubt whether there’s life on Earth-like planets.
C. There’s no life on Earth-like planets.
D. There’s life that we don’t know on Earth-like planets.
5. What attitude should we hold on the development of science?
A. Agreeable.
B. Critical.
C. Disagreeable.
D. Neutral.
答案与解析
【文章大意】
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