PART I. PRACTICE Exercise 1: Mark the letter A, B, C, or D to indicate the word whose underlined part differs from the other three in pronunciation in each of the following questions. 1. childhood 2. A. admire B. biography achievement 3. A. campaign C/marriage C. adopt C. biography 4. A. stylish 5. A. diagnosed B. contribution B. distinguished achievement passed B. diary D. biological (D army D military D. communist D. launched