This document provides a summary of Unit 10 of an English language textbook. It focuses on pronunciation and grammar. The pronunciation section covers the sounds /sl/, /sm/, /sn/, and /sw/. The grammar section explains the use of relative pronouns such as who, whom, which, and that in sentences containing prepositions. Examples are provided to illustrate how to use relative pronouns correctly when a preposition precedes it in a clause. Exercises are included for students to practice these grammar and pronunciation points.