Q16: 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
A. a greater proportion than it was B. a greater proportion than C. a greater proportion than they have been D. which is greater than was so E. which is greater than it has been 这题怎么答案C?和先前的竞选比较不是应该用过去完成时,怎么可以用现在时态?我用排除法选了B |