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.
B,a greater proportion than
C, a greater proportion than they have been
E, which is greater than it has been
The answer is C, But I think it shoud use past tense. what do you guys think?
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发表于 2005-1-15 01:01:00
