这道题是固定用法么？还是 But instead 有问题？

youwsw

1.Child prodigies are marked not so much by their skills but instead by the fact that these skills are fully developed at a very early age.
(A) but instead
(B) rather than
(C) than
(D) as（D）
(E) so much as

clumsy123

固定搭配吧，so much……as

brendaqian

not so much...as...
as much...as= so much...as