二、綜合測驗
    Though the incident happened long ago, I can still remember itclearly.  It was   21.   the morning of my first day of high school.  I ran to the mirror excitedly, but I found   22.   was a huge red zit on my nose.  I felt surprised and upset,   23.   I might be laughed at by my classmates.  I tried to hide the ugly zit, but everything I did was in vain.  I even thought about   24.   school, but my mother stopped me.  As I didn’t know what to do, I felt rather   25.  .  Luckily, when I was in school, no one spoke of my pimple,and I made it through the day.  However,I was   26.   uncomfortable thatI couldn’t stop wondering whether or not my classmates were talking about itbehind my back.  A year went by, and oneday I pointed   27.   mynose and asked my best friend whether she remembered the incident.  She said no. In turn, she asked me if I had noticed the ugly orange shirt she waswearing on that day, and I said no.  Ithereby found that most people pay attention to their own flaws   28.   others’, for they don’t have the time orenergy to care about others too much. There was,   29.  , no need for me to have worried so muchabout my pimple.  Therefore, I decided toforget all my flaws and live a   30.   happier life from then on. 

【題組】21.
(A) at
(B) on
(C) in
(D) for