Can you tell me to join the army?
A. how does a person have to be old
B. how old does a person have to be
C. how old a person has to be
D. how a person has to be
网友回答
A. how does a person have to be old
B. how old does a person have to be
(答案→)C. how old a person has to be
D. how a person has to be
解析：可联系答.案.网客服索取。