用下列短语或单词写英语片段

sell sth to sb/sp

look for

take a bus

help sb do

call sb at

would like

afford

find

be busy doing

I can't afford a pen when I was eight years old.so I'm always busy studying hard because my mum said that if I would be the NO.1 in my class ,she would like buy me a pen which would help me learn better.and finally ,I reached my goal. I called my mum to take a bus to buy the pen with me.we find a large shop which sells better pens to residents in our village.and this pen helps me learn more knowledge,so that I could be better and better，so thanks to my mum ,so did the pen.