问题
选择题
Tom was ______ that he couldn’t understand ______ difficult sentence.
A．so a stupid boy; such
B．a so stupid boy; a such
C．so stupid a boy; a such
D．so stupid a boy; such a
答案
答案：D
本题考查状语从句。so和such用法分别为：so+形容词+（a/an）+名词，such a/an +形容词+名词，故选D。