Question

--- How come your father can read books in German?
--- Well, he        on a project with some German engineers for 3 years when he was young

1. A.
   worked
2. B.
   was working
3. C.
   had worked
4. D.
   would work

Answer 1

A
试题分析：考查时态。句意：——你父亲怎么能用德语看书？——哦，他在年轻时和一些德国工程师共事过3年。从时间状语when he was young可知主从句动作同时发生，排除答案C和D，根据语境可知，他现在不再和德国工程师共事，所以只是强调过去的一个事实，故使用一般过去时。此题容易根据时间状语for 3 years 误选答案C。
考点：考查时态。