-- How long do you think it will be the USA recovers from the losses of the financial crisis?
-- Perhaps four or five years.
A. when
B. since
C. that
D. before
网友回答
A. when
B. since
C. that
(答案→)D. before
解析：考查状语从句的连词。此句为固定的状语从句结构：It will be + 一段时间 + before从句，从句用一般现在时，常译为“过了多久才…/ 过了不久就…”。本题翻译“你认为美国从金融危机的损失中恢复过来还需要多长时间？”