中考英語作文：如果我能留住彩虹(If I can retain the Rainbow)

if i could catch a rainbow
    i would do it just for you
    and share with its beauty
    on the days you're feeling blue.
    if i could build a mountain
    you could call your very own
    a place to find serenity
    a place to be alone.
    if i could take your troubles
    i would toss them into the sea
    but all these things i'm finding
    are impossible for me.
    i cannot build a mountain
    or catch a rainbow fair
    but let me be what i know best
    a friend that's always there.