T-4-Q30
Unlike the short flights of the shuttle and earlier spacecraft, which carried sufficient power in fuel cells and batteries, a permanently orbiting space station will have to generate its own electricity.
A.the short flights of the shuttle and earlier spacecraft, which carried sufficient power in fuel cells and batteries
B.the shuttle and earlier spacecraft, with sufficient enough power in fuel cells and batteries for their short flights
C.the short flights of the shuttle and earlier spacecraft, which enabled them to carry sufficient enough power in fuel cells and batteries
D.the shuttle and earlier spacecraft, which were capable of carrying sufficient power in fuel cells and batteries for their short flights
E.the flights of the shuttle and earlier spacecraft, whose shortness allowed them to carry sufficient power in fuel cells and batteries
答案是D 我选B。
我已开始就排除了含which的选项，因为觉得which不能一次只带前面两个东西啊。而且D中的which were明显是指代前面两个。
可以这样么？而且B怎么不对呢？
来个人解脱我把
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