LESSON 1 MADAME CURIE AND RADIUM 1
LESSON 2 THE GIFTS 39
LESSON 3 THE GIFTS（Continued） 77
LESSON 4 ADVENTURE ON HIGHWAY 66 112
LESSON 5 PERSEVERANCE 147
LESSON 6 A GERMAN STAMP 185
LESSON 7 ON READING 217
LESSON 8 THREE GOLD MEDALS FOR WILMA 255
LESSON 9 THE SNAKE IN THE SLEEPING BAG 287
LESSON 10 MY TEACHER 323
LESSON 11 THE TRIAL 353
LESSON 12 CHARLES DARWIN 378
KEY TO THE ADDITIONAL EXERCISES 407