Question

—How long do you think it will be ________ we win the football World Cup?   
—Perhaps twenty years.

A．when

B．since

C．that

D．before

Answer 1

D

句型考查题。It will be +段时间 +before …。句意：你认为要过多久我们才能赢得足球世界杯？也许二十年。