I took part in the party when I was 13 years old

I took part in the party when I was 13 years old He ___ the army when he was eighteen years old.A took part i 英语改错..When I was four years old I got ill.I took medicine tw When I was seven years old I remember that ____ took part in the ball party had a wonde When I was twenty-seven years old, I was a clerk in San Fran I JOINED the league two years ago ( ) a.took part in b.becam When I was six years old.I was visiting When I was ten years old,Istarted to piay the piano.对When I When I was six years old I visited the Great Wall ,为什么when后面 When I was two or three years old,I lived in a house that ha i began learning English when I was years old.