Unit 13 Albert Einstein
Unit 14 Satellites
Unit 15 A farmous 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 Telehones
Unit 24 Mainly revision
Test 1
Test 2
录音内容
参考答案
· · · · · · (
收起)