The young man is a friend of mine.为什么选B不选A?

The young man is a friend of mine.为什么选B不选A? The young man____ is a friend of mine.A.who I had a talk B.w The man ___was a friend of mine. the man you________was a friend of mine A friend of ____ is in front of the classroom A I B mine C m She is a friend of --------. A.mine B.me The girl _B___ is a friend of mine . a friend of mine(I) is a good reporter中为什么用mine The young man is very excellent.Now he is the top dog of a b The young man is very exceiient.Now he is the top dog of a b Tom is a best friend of mine. he is a friend of mine