[求助]og-92

92. Never before had taxpayers confronted so many changes at once as they had in the Tax Reform Act of 1986.
(D)as many changes at once as they confronted in
(E)so many changes at once that confronted them in

Choice E,too, presents an unidiomatic comparison with so many....that

ets 的意思是 so many....that 的用法是错的吗，why? so...that 句型嘛。

是不是 so...that 中间只能加形容词呢？