4. Passing objects might cause a fall in light.

　　5. Corot can tell whether there is another Earth-like planet.

　　Based on your reading of the passage, complete the sentences below with words taken from the passage. Use NO MORE THAN THREE WORDS for each answer.

　　With measurements, scientists will be able to search for some gaseous and rocky planets. They will be extremely excited if they can discover some small 6. __________, the expected number of which could be up to 7. __________ .

　　Corot will enable scientists to study the 8. __________ of stars. In this way, a stars mass, age and chemical composition can be calculated.

　　According to Prof Roxburgh, changes in light can be caused by passing planets or star 9. __________. The related statistics can gain us a better 10. __________ of the star formation and evolvement.

　　Observatories have found many exoplanets, which are 11. __________ other stars than the Sun. The common way used in finding exoplanets can only detect huge gas planets, which do not 12. ___________ .

　　With the launching of Darwin, astronomers will be able to analyse whether those rocky planets have 13. __________ for life.

　　Answer keys:

　　1. 答案：A

　　2. 答案：TRUE

　　3. 答案：NOT GIVEN

　　4. 答案：TRUE

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