Unit 11 Scientific achievements 1
Part 1 Text Explanation 1
Part 2 Typical Problems 39
Part 3 Synchronous Test 40
Part 4 Key and Hint 47
Unit 12 Fact and fantasy 52
Part 1 Text Explanation 52
Part 2 Typical Problems 95
Part 3 Synchronous Test 97
Part 4 Key and Hint 103
Part 1 Text Explanation 108
Unit 13 The water planet 108
Part 2 Typical Problems 140
Part 3 Synchronous Test 141
Part 4 Key and Hint 148
Unit 14 Freedom fighters 153
Part 1 Text Explanation 153
Part 2 Typical Problems 184
Part 3 Synchronous Test 185
Part 4 Key and Hint 193
Unit 15 Destinations 197
Part 1 Text Explanation 197
Part 2 Typical Problems 227
Part 3 Synchronous Test 229
Part 4 Key and Hint 235
Unit 16 The United States of America 239
Part 1 Text Explanation 239
Part 2 Typical Problems 270
Part 3 Synchronous Test 271
Part 4 Key and Hint 279
Unit 17 Disabilities 283
Part 1 Text Explanation 283
Part 2 Typical Problems 310
Part 3 Synchronous Test 311
Part 4 Key and Hint 319
Unit 18 Inventions 324
Part 1 Text Explanation 324
Part 2 Typical Problems 347
Part 3 Synchronous Test 348
Part 4 Key and Hint 355
Unit 19 The Merchant of Venice 360
Part 1 Text Explanation 360
Part 2 Typical Problems 387
Part 3 Synchronous Test 388
Part 4 Key and Hint 395
Unit 20 Archaeology 400
Part 1 Text Explanation 400
Part 2 Typical Problems 420
Part 3 Synchronous Test 421
Part 4 Key and Hint 428