問題 大全 987-Q86

[mimichang]

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
E. Having orbited just inside

ANS B
我選D 此題選B的原因是語意上一定要用ALTHOUGH嗎?
是否可以解釋一下B為什麼不行

[amazingslim]

大全987討論彙總裡有
http://www.formosamba.com/phpBB3/viewtopic.php?t=28069

[dibert8]

考連接詞子句主詞省略; 只有 (B) 的主詞 (it = the comet: the +N 表示前面提到過,那就是 it) 在邏輯上是對的.