雅思阅读练习及答案：Search begins for Earth

　　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 star’s 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 (第3段第1句：Corot, short for convection rotation and planetary transits, is the first instrument capable of finding small rocky planets beyond the solar system. A项中的certain planets指small rocky planets beyond the solar system.)

　　2. 答案：TRUE (第5段第1、2句： At the present moment we are hoping to find out more about the nature of planets around stars which are potential habitats. We are looking at habitable planets, not inhabited planets. 问题中的“that can be inhabited”意思就是inhabitable.)

　　3. 答案：NOT GIVEN (文中没有提及该信息。)

　　4. 答案：TRUE (第7段第1句：To search for planets, the telescope will look for the dimming of starlight caused when an object passes in front of a star, known as a "transit".)

　　5. 答案：FASLE (第7段第2、3句：Although it will take more sophisticated space telescopes planned in the next 10 years to confirm the presence of an Earth-like planet with oxygen and liquid water, Corot will let scientists know where to point their lenses. )