1. challenge: 　　
    address:
    benefit:
    Every time I challenge to him, he gets rid of me.
    Our teacher ______ us on this subject.
    Moderate exercise will ____ you.
    2. inhabit:
    patrol:
    They inhabit in that city.
    The police patrolled on the streets.
    3. avenge:
    defend:
    serve:
    I will avenge for you on him.
    The lawyer ______ the accused.
    We should _____ the people heart and soul.