问题
选择题
．You’d better get the problem solved as soon as possible ______ it becomes out of control．
A．when
B．before
C．since
D．unless
答案
答案：B
考察连词.句意:你最好在它变得失控之前尽快解决这个问题.选B,在……之前。
搜题请搜索小程序“爱下问搜题”
．You’d better get the problem solved as soon as possible ______ it becomes out of control．
A．when
B．before
C．since
D．unless
答案：B
考察连词.句意:你最好在它变得失控之前尽快解决这个问题.选B,在……之前。