A. Grandpa and grandson

　　B. Carrying water in a basket

　　C. Reading for total changing

　　D. Baskets and books

　　【参考答案】60 -63 ADCC   

　　【山东省宿州市2017高考英语综合能力测试卷】

　　阅读下列短文，从每题所给的四个选项（A、B、C和D）中，选出最佳选项。Last week, we explained that the planet Mars has passed “opposition”. It passed a point opposite the Sun. This week, we tell about the planet’s surprising motion(运动)among the stars.

　　For thousands of years, people have recognized that planets travel among the stars. The planets generally follow the path taken by the Sun through the sky. The Sun’s path is called the ecliptic. The groups of stars along the ecliptic are called the Zodiac.

　　The motion of the planets can be confusing at times. Everyone knows the Sun rises in the east and sets in the west. But this is caused by the turning motion of the Earth. Planets generally move from west to east.

　　However, Mars will appear to move backward for about two months this year. This happens because the Earth is overtaking Mars on its way around the Sun. Mars began its backward, or westward, motion on May 11th, It will start moving eastward again on July 19th.

　　Mars’ apparent motion has been a mystery to astronomers for hundreds of years. Most early theories of the solar system argued that the Sun and planets turned around the Earth. But the sudden westward motion of Mars presented a problem. Why would Mars move west for two months when it nears “opposition”?

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