单项选择题

Agriculture was a step in human progress ______ which subsequently there was not anything comparable until our own machine age.

A．to
B．in
C．for
D．from
<上一题 目录 下一题>
热门 试题

单项选择题
Nobody knows, ______
A．does nobody
B．does one
C．does he
D．do they
单项选择题
After having gone ______ far, George did not want to turn back.
A．enough
B．much
C．such
D．that
相关试题