根据短文内容和所给中文提示，在空白处写出正确的单词，每空—词。

    My father's birthday is coming. I (需要) to buy some things for him. Should I buy (他) a T-shirt or a (双) of (长裤)? I am not (确定的). I go and ask Mom for help. She tells me to buy some socks. I go to Mr. Zhang's Clothes (商店). Oh, I'm lucky. It (出售) all the clothes at very good (价格). 1 take some socks and a T-shirt (为) my father. They are (三十) dollars.