问题
选择题
He was unable to make such progress, _______.
A．as he tried hard
B．as hard he tried
C．so hard did he try
D．hard as he tried
答案
D
本题是由as引导的让步状语从句，将表语或状语提前，结构是“表语/状语+as+主语+谓语”。
搜题请搜索小程序“爱下问搜题”