单选题 .  Almost everyone has a hobby. A hobby can be     41    people like to do in their spare time. A hobby can     42    them with interest, enjoyment, friendship, knowledge and     43    . It can be something     44    they learn more about themselves or about the world. It may introduce them to friends who share their enthusiasm and from whom they can also learn. It helps both manual     45    mental workers relax after periods of hard work. It also offers interesting and enjoyable     46    for retirees.     47    , it can benefit people's mental and physical health.
    Different people have different hobbies. People who     48    hobbies are hobbyists. Some paint pictures, sing pop songs,     49    on musical instruments and enjoy     50    coins or stamps; others     51    flowers, go fishing, hunt animals or spend their time     52    sports: climbing mountains, swimming, skating and playing     53    . Anyone, rich or poor, old or young,     54    or well, can follow a satisfying hobby,     55    his age, position, or income.     56    for me, I like sports very much. Sometimes I play tennis or badminton or go swimming. Sometimes I exercise     57    and go running regularly in the morning.     58    I choose, if I exercise regularly, I will be sure to     59    and improve my health     60    my life.41.