请NN指教them指代是否歧义？OG13 99

Hugateddybear

99. The stars, some of them at tremendous speeds, are in motion just as the planets are, yet being so far away from Earth that their apparent positions in the sky do not change enough for their movement to be observed during a single human lifetime.
(A) The stars, some of them at tremendous speeds, are in motion just as the planets are, yet being

(B) Like the planets, the stars are in motion, some of them at tremendous speeds, but they are

(C) Although like the planets the stars are in motion, some of them at tremendous speeds, yet

(D) As the planets, the stars are in motion, some of them at tremendous speeds, but they are

(E) The stars are in motion like the planets, some of which at tremendous speeds are in motion but

此题答案是B，这个我理解了。但是B中的them指代不会歧义吗？前面有两个可以被指代的单词，一个是stars一个是planets？

先谢过 ：)

bejamin1111

从语法角度是有，不过从逻辑角度我们不难判断指代的是stars，那就ok。适度pronoun ambiguity在gmat中是允许的，前提是逻辑清晰。

Hugateddybear

bejamin1111 发表于 2013-4-18 20:35
从语法角度是有，不过从逻辑角度我们不难判断指代的是stars，那就ok。适度pronoun ambiguity在gmat中是允许 ...

谢谢帅皮特~  我明白你说的啦。但是还有个小问题，这个“适度”的度要怎么确定？代词可以算作一个split来排除选项嘛？