Sách bài tập

6. 1.6 Use of English So and such

8. 1.8 Speaking

9. 1.9 Self-check

Unit 2. Science and invetions

1. 2.1. Vocabulary

3. 2.3 Listening

4. 2.4. Reading

5. 2.5. Grammar

6. 2.6. Use of English Linkers and time expressions

7. 2.7. Writing

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