34. In context，which of the following is the best version of the underlined portion of sentence 13(reproduced below)?

　　Clearly they need to resolve the issue of Pluto’s classification.

　　(A) (as it is now)

　　(B) the public needs

　　(C) something was needed

　　(D) further observations were needed

　　(E) a precise definition of planet hood was needed

　　答案：E

　　解析：A选项中的的they无指代对象，且need时态错误;B的needs 时态错误;C的something表意不清;D、E相比，Sentence 14提到了IAU对planet下的定义，所以从上下句看，E选项更符合要求。

　　35. Which of the following sentences, if placed immediately after sentence 15, would best conclude the passage?

　　(A) Pluto’s discover, Clyde Tombaugh, had died in 1997 and so did not live to see his beloved planet demoted.

　　(B) Ceres and Pallas had undergone a similar demotion in the nineteenth century when they were reclassified as asteroids rather than planets.

　　(C) Ultimately, then, Pluto was demoted from planetary status not because of its small size but because of the clause company it keeps.

　　(D) This was perhaps the most momentous decision that the International Astronomical Union had made in its 87-year history.

　　(E) Nonetheless, supporters of Pluto point out that it has more moons than Mars, Earth, Venus, or Mercury.

　　答案：C

　　解析：总结句的作用有三个：一是重复前句，二是总结本段，三是总结全文。本段提出了definition，Sentence 15提到Pluto不满足第三个条件，C提到demoted(降级)与之呼应，且C的后半句与前文呼应。其他选项都无关。