全真987-86（ sec04-17）求解！

1.        Although just inside the orbit of Jupiter, amateur astronomers with good telescopes should be able to see the comet within the next few weeks.

(A) Although just inside the orbit of

(B) Although it is just inside the orbit of

(C) Just inside the orbit of

(D) Orbiting just inside（B）

(E) Having orbited just inside

正确答案是b，此题在语法方面完全不懂，望强人解释！

(B) Although it is just inside the orbit of

it refers to the comet

To be discussed

但it不会出现指代不清的问题吗？是指comet 还是 astronomers

只要主谓宾在, 主语不要求和从句一致，所以b无歧义
            

让步从句的省略形式:althought + doing/done/adj.，前提从句和主句的主语一致

lz下一个大全注释吧，很详细的，如果有解决不了的问题在版上搜题号 大全***，或者978-***

再不行再发。

这个题我前两天也错过，看看解释就解决了，还扩展到了一个语法点（大家的解释很精辟！）

谁能解释一夏阿，谢谢啦