问题
选择题
How long do you suppose ______ we applied for the job ________ we had been trained .
A．has it been since ; for which
B．is it before ; in which
C．it is when ; that
D．it is since ; for which
答案
答案：D
第一空考查语序问题，do you suppose是插入语，在疑问句中疑问句是陈述句语序，答案在CD里面选，考查句型是It is+一段时间+since…., 自从…有多久了。第二空填for which引导定语从句，修饰the job，句意是：你认为我们申请受过训练的工作要多久。选D。