a) Mark's my best friend. i have known him for a long time. we first met in kindergarten!
b) Megan feels a little lonely:it's the first time she has been away from her family.
c) -how long you belong to this fraternity? - since i’ve settled on campus.
d) -how long he was playing in the soccer team? -for four years. then he leaved for college.
e) Ann is certainly the best friend i ever had.