GWD1-Q16与LZM9-3，请解惑

GWD1-Q16选B)

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
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

LZM9-3：(选C)

    A large rise in the
number of housing starts in the coming year should boost new construction dollars
by several billion dollars, making the construction industry’s economic health
much more robust than five years ago.

(A) making the construction industry’s
economic health much more robust than five years ago.

(C) making the construction industry’s
economic health much more robust than it was five years ago.

LZM：说than之前的the construction industry’s economic health与five
years ago比较不对应。那GWD1-Q16中a
greater proportion与in any previous election对应么？该如何理解？谢谢

补全最好，不补也不错。

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

A錯在it was，可省略it was.不簡潔

C錯在題目是比例相互比較，而不是主詞costs的比較. 後者主詞型態不對，且時態也不對，造成語意改變。