Preface
Unit 13 Albert Einstein
Unit 14 Satellites
Unit 15 A famous detective
Unit 16 The sea
Unit 17 Life in the future
Unit 18 Mainly revision
Unit 19 A freedom fighter
Unit 20 Disability
Unit 21 Music
Unit 22 A tale of two cities
Unit 23 Telephones
Unit 24 Mainly revision
Appendix
Test paper 1
Test paper 1
· · · · · · (
收起)