Question

【题目】His brother ________ for three months.

A. has joined the army B. has been in the army

C. has become a soldier D. joined the army

Answer 1

【答案】B

【解析】

句意：他哥哥参军3个月了。根据for three months可知用延续性动词，join和become都是短暂性动词；be in是延续性动词；故选B。