Question

【题目】My grandparents wrote letters to keep in touch with others_________ they were young.

A. when B. since C. after D. before

Answer 1

【答案】A

【解析】

句意：当我的爷爷奶奶年轻时，他们写信和别人保持联系。本题考查连词的用法。A. when当……的时候；B. since自从；C. after在……之后；D. before在……之前。表示“当……时”要用连词when。故选A。