Neither - None - Both - All

The communication intent of an indefinite pronoun is to refer to an identifiable but not specified person or thing. An indefinite pronoun conveys the idea of all, any, none, or some. The most common indefinite pronouns are ``all,'' ``another,'' ``any,'' ``anybody,'' ``anyone,'' ``anything,'' ``each,'' ``everybody,'' ``everyone,'' ``everything,'' ``few,'' ``many,'' ``nobody,'' ``none,'' ``one,'' ``several,'' ``some,'' ``somebody,'' and ``someone.''
(http://newton.uor.edu/facultyfolder/rider/pronouns.htm)

1. Use

2. Exercise

3. Exercise