This document discusses the use of demonstrative pronouns in English - this, that, these, those. It explains that this/these refer to things that are near the speaker, while that/those refer to things farther away. Examples are provided to illustrate the use of each pronoun with singular and plural nouns as well as with prepositions like here and there. An exercise is included for the reader to practice using the demonstrative pronouns in sentences. The document also provides a sample conversation using the pronouns to ask about and refer to objects in different locations.