閱讀下面的短文，根據(jù)所給語境，按要求完成下列各題。
①After Pluto (冥王星) was found in 1930, people took it as the ninth planet in our solar system(太陽系). But it isn’t like other planets. It is smaller and has an strange orbit(軌道). On August 24,2006， scientists said,“Pluto is not a planet.”
About 2,500 scientists met in Prague（布拉格，捷克首都）. At first, some of them said that there would be 12 planets in our solar system. In the end, the scientists said that only Mercury（水）, Venus（金）, Earth, Mars（火）, Jupiter（木）, Saturn（土）, Uranus（天王）and Neptune（海王）are the planets in the solar system. ②Each of these planets has its own orbit, and of the planets is big enough to be a planet. Pluto’s orbit overlaps (重疊) Neptune’s and it is smaller than the other planets. ③So Pluto is classified(劃歸/分類) as a dwarf planet (矮行星), but no longer a planet in the solar system.
Students at school will have new schoolbooks to learn the new solar system!
小題1:根據(jù)①處完成下面的句子（每空一詞）
Before people _______ Pluto in 1930, there were _______ planets in our solar system.
小題2:根據(jù)②出完成下面的句子（每空一詞）。
Every planet not only has its own _______ , but also is ______ enough.
小題3:將③處譯成漢語。
—————————————————————————————

小題1:found, eight
小題2:orbit, big(large)
小題3:所以（因此/因而）冥王星被劃歸到（劃分為）矮行星，而不再是太陽系的（一顆）行星。

試題分析：本文介紹了冥王星在1930年被人們認(rèn)為是太陽系的第九大行星。但是，在2006年8月24日，科學(xué)家又說冥王星不是一顆行星。因為每一顆行星都有自己的軌道，而且自己足夠大能成為一顆行星。所以冥王星被劃歸到矮行星，而不再是太陽系的一顆行星。
小題1:根據(jù)After Pluto (冥王星) was found in 1930, people took it as the ninth planet in our solar system(太陽系)可知在1930年，冥王星被發(fā)現(xiàn)之后，人認(rèn)為它是太陽系中第九大行星，也就是說在人們發(fā)現(xiàn)冥王星之前，人們認(rèn)為太陽系里有八顆行星。故第一空為found, 第二空為eight。
小題2:根據(jù)②Each of these planets has its own orbit, and of the planets is big enough to be a planet. 可知每一顆行星都有自己的軌道，而且自己足夠大能成為一顆行星。故第一空為orbit, 第二空為big或large。
小題3:根據(jù)is classified(劃歸/分類) as a dwarf planet (矮行星)的意思是被劃歸為矮行星。no longer的意思是不再是。in the solar system.的意思是在太陽系。故這句話的意思是：所以（因此/因而）冥王星被劃歸到（劃分為）矮行星，而不再是太陽系的（一顆）行星。
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