I was five years old when my little brother，Murk，was born．Looking back at photos，I appeared so thrilled that he had finally arrived．I held and bathed him，smiling from cheek to check．I do not remember that feeling now．
Being the first child in the family，I was the one my parents tested their new parenting techniques on．I was their guinea pig．Mark was always the happy one，the joker，the one who won because of my battles with my parents．After too many fights，I declared war on Mark．We were now enemies．All l remember is being jealous of （妒忌） and angry with my innocent little brother．
Thus．I made his life a misery．I teased，tricked，embarrassed，and fought with him．often leaving him in floods of tears．
Our little sister was born when I was 11．and instantly she and Mark could not be separated．They pushed me aside．Was this because Iwas becoming a monster，or did Igrow into an uglier green-eyed monster because they loved each other so much？
Thankfully，Mark quickly grew tall and strong，and our conflict looked more like a cold war than bloodshed （流血）．It all ended suddenly when I went to study abroad．The hatred （仇恨） disappeared and love climbed in．
Despite all the abuse Mark suffered he has implied that he has forgiven me，or even that there is nothing to forgive，although I have never brought up the subject in too much detail．I would like to； however，it would be a selfish move to look for more forgiveness．But I prefer to remember the hurt．During all those wasted years，I should have been the loving sister，defending instead of attacking．
28．How did the writer feel at the birth of her brother？___
A．Worried．B．Excited．C．Surprised．D．disappointed．
29．Why did the writer consider her brother as her enemy？___
A．She didn't like her brother．
B．She'd like to be a monster．
C．She used to be ill-treated．
D．She did so out of jealousy．
30．When did the writer's hatred of her brother