问题补充:
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:
A. as he tried hard
B. as hard he tried
C. so hard did he try
(答案→)D. hard as he tried
解析:考查as引导的倒装句。当as放在名词,形容词,副词的后面,句子使用倒装句。本题hard as he tried=Though he tried hard.尽管他很努力了。。。。