How long have you____the army

How long have you____the army How long have you____the bike?A.had B.been C.bought拜托各位了 3Q 摘自听力材料:W:How long have you been in the army service M:Twenty have you____the book before? how much did you____the computer How long before did he join the army?改错. How long before did he join the army?改错 How long have you____? How long have you________? how long have the greens--. How long have you ___Tom? how long have you()shanghai