OG(11TH)4

[吳]

A survey by the National Council of Churches showed that in 1986 there were 20736 female ministers, almost 9 percent of the mational's clergy,twice as much as 1977.
(a)twice as much as 1977
(b)twice as many as 1977
(c) double what it was in 1977
(d)double the figure for 1977
(e)a number double that of 1977's

answer:(d)
請問一下double的主辭為何?又為何不用in用for???
tks...

[freshmanduke]

問問題時請先爬一下文 吧!^^
http://www.formosamba.com/phpBB3/viewtopic.php?t=8664