This document provides a summary of 11 units covering various topics:
- Unit 7 discusses our world and plural nouns without numbers.
- Unit 8 covers protecting our planet and conditional clauses.
- Unit 9 is about building a greener world and the past habit "used to".
- Unit 10 discusses space travel and the present perfect and past perfect tenses.
- Unit 11 is about media past and present, using the past simple tense and reported speech.
The document provides examples and explanations of grammar points covered in each unit.