When did Mr Black take you to Beijing?
问题描述：
When did Mr Black take you to Beijing?
A. As a young man B. At the age of 20 C. In mytwenties D. I was 20
从语法上讲ABD为什么错
答
A 不能表明是“过去”；B 是中式英语思维的产物,只是用于表述用,不是“回答”；D 则是答非所问.