Question

十万火急！！一道英语选择题，请详细解释

Some educators argue that audio-visual devices have not made as significant a contribution to education_________.
A.as it was first expected B.as was first expected
C.so was first expected D.as to be first expected
A为什么错？

Answer 1

选B
这里考察as...as的用法，表示“像...一样”，所以C排除
由于设备是被期望，用被动语态 be expected,前面用了have not made as significant a contribution to education是过去完成时，所期望发生在作出巨大贡献之前所以用一般过去时，was first expected.
as was expected 果然不出所料 是习惯用法。

Answer 2

答案是B么？

Answer 3

B