OG11 的76题的问题

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

(C) at once as  many changes that there were with

(E)so many changes at once that confronted them in

1(A)中的had为什么不对，og解释说时态不对 ，应该用过去时，但是这里had也可以理解成have的过去时啊？难道不能说have changes

2(E)中，答案解释说 the subeject of the verb should be "they"

             谁能解释下，答案的解释是什么意思

3(C)，答案解释说at once is awkwardly placed,为什么啊？

1. 如果你不认为过去是有问题的话，那么应该用did或者confronted (like that in the answer),have和confront平行的不好。

2. 就是说they confront啊；

3.yaoyao解释的很好。