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
A．has joined the army B．has been in the army
C．has become a soldier D．joined the army
A.
has joined the army
B.
has been in the army
C.
has become a soldier
D.
joined the army
知识点：专题08 单项选择专练100题（二）（人教版）章节：专题08 单项选择专练100题（二）（人教版）