31.__ unemployment and crime are high,it can be assumed that
31.__ unemployment and crime are high,it can be assumed that the latter is due to the former.A.
31.__ unemployment and crime are high,it can be assumed that the latter is due to the former.
A.Before B.Where C.Unless D.Until
选B
这道题的考点是什么?并且请帮忙分析一下句子的各个成分.