he said he ___(join) the army after he left the college

My brother ___(join) the army when he ___ (be) 20 and he ___ he left the room after he ---- goodbye He join the army when he was fifteen(保持原句意思）He join the army How long before did he join the army?改错. It is ten years since he ____(join) the army How long before did he join the army?改错 After he said goodbye to his friends,he left.After ___ ___ t It _____ ten years since he left the army. It _____ ten years since he left the army . 1.It _____ten years since he left the army . He is believed ___ the college exam. It is said _______ he has joined the army.