[求助]GWD 1 -16

xiongluanyu

Soaring television costs accounted for more than half the
spending in the presidential campaign of 1992, a greater proportion than it
was in any previous election.

a greater proportion than it was
a greater proportion than
a greater proportion than they have been
which is greater than was so
which is greater than it has been

答案到底是B 还是C. 真不知道选那个啦。多谢！

alanguo

我选C。

xiongluanyu

Thanks.

那么than后面的东东何时省何时又不省？请指教。

owidiel

应该用完成时。我选e。答案是什么？