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Câu hỏi:
(9) .....................
- A. mark
- B. speck
- C. trace
- D. bit
Lời giải tham khảo:
Đáp án đúng: C
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CÂU HỎI KHÁC
- Many people have (1) _____ about this question.
- Some writers of science-fiction think of people from Mars (2) _____ little green creatures. Others imagine 'Martians' as monsters with many eyes.
- The first (3) _____ of this is that Mars has seasons, just like Earth.
- In other words, Earth's seasons, such as spring or summer, occur on Mars too. Because these seasons exist, it may be possible for (4) _____ and other higher
- (5) _____ forms to be found on Mars.
- Astronomers also think that perhaps a small (6) _____ of water vapor could be found on Mars.
- This finding (7) _____ astronomers to believe that since water exists on Mars, life forms could exist as well.
- However, there are (8) _____ who feel that life on mars is not possible.
- This is because there is little or no (9) _____ of oxygen on the planet.
- (10) _____, people remain fascinated by the idea that there could one day be life on Mars.
