用所给词的适当形式填空。每词限用一次。
pass by，sell，mail，ride，serve
【小题1】His parents make a living by _________ vegetables in the market.
【小题2】I _________ never _________ a horse before.
【小题3】When I _________ the library，I found a small girl crying in the corner.
【小题4】The Noodle House usually _________ all kinds of noodles we like.
【小题5】Don't forget _________ the postcard for me，Linda.