问题
选择题
______, they couldn’t solve the mystery.
A．Tried hard as they
B．Hard as they tried
C．Tried as they hard
D．They tried hard as
答案
答案：B
考查as引导的让步状语从句的倒装。as引导让步状语从句要提前表语、状语或动词原形，此处有状语，先提前状语成分，其结构：形容词/名词/副词/动词原形+as+主语+其他-----。