4. He wants to be a detective. He loves solving ________. A. thief B. story C. clues D. mysteries 5. Lady Trieu rode a big white elephant and won many ________. A. battles B. army C. heroes D. general 6. Volleyball and table tennis are ________ because we often play them in a sports center. A. indoor activities B. outdoor activities C. drama D. acting 7. The detective is good at ________ clues. A. find B. finding C. having D. making 8. Nguyen Hue was a great ________ in the history of Vietnam. A. army B. battle C. hero D. soldiers 9. In Bach Dang river, Tran Hung Dao ________ the Mongols. A. defeated B. win C. admired D. took 10. My favorite subject is ________ because I love reading stories and writing essays. A. art B. literature C. history D. geography