00:47duration 47 seconds
Chapter 12, Lesson 1, Exercise 1
00:41duration 41 seconds
Chapter 12, Lesson 1, Exercise 2
00:58duration 58 seconds
Chapter 12, Lesson 1, Exercise 7
01:01duration 1 minute 1 second
Chapter 12, Lesson 2, Exercise 1
00:46duration 46 seconds
Chapter 12, Lesson 2, Exercise 7
00:39duration 39 seconds
Chapter 12, Lesson 2, Exercise 9
00:50duration 50 seconds
Chapter 12, Lesson 2, Exercise 10
00:36duration 36 seconds
Chapter 12, Lesson 3, Exercise 1
00:29duration 29 seconds
Chapter 12, Lesson 3, Exercise 5
01:12duration 1 minute 12 seconds
Chapter 12, Lesson 3, Exercise 6
01:22duration 1 minute 22 seconds
Chapter 11, Lesson 1, Exercise 1
00:34duration 34 seconds
Chapter 11, Lesson 1, Exercise 5
00:35duration 35 seconds
Chapter 11, Lesson 1, Exercise 7
01:56duration 1 minute 56 seconds
Chapter 11, Lesson 2, Exercise 1
00:32duration 32 seconds
Chapter 11, Lesson 2, Exercise 6
00:51duration 51 seconds
Chapter 11, Lesson 2, Exercise 7
00:48duration 48 seconds
Chapter 11, Lesson 3, Exercise 1
01:34duration 1 minute 34 seconds
Chapter 11, Lesson 3, Exercise 7
00:19duration 19 seconds
Chapter 10, Lesson 1, Exercise 1
01:31duration 1 minute 31 seconds
Chapter 10, Lesson 1, Exercise 2
00:40duration 40 seconds
Chapter 10, Lesson 1, Exercise 7
Chapter 10, Lesson 1, Exercise 8
00:45duration 45 seconds
Chapter 10, Lesson 2, Exercise 1
00:21duration 21 seconds
Chapter 10, Lesson 2, Exercise 10
02:05duration 2 minutes 5 seconds
Chapter 10, Lesson 3, Exercise 1