參考答案：

　　Exercise I:

　　1. where 2. to 3. day 4. to 5. the 6. of/in 7. to 8. which/that 9. is/remains 10. to 11. as 12. that 13. of 14. it/water 15. done 16. him/man 17. his 18. to 19. of 20.own

　　Exercise II:

　　1. and 2. the 3. of 4. increased 5. at 6. rate/aped/pace 7. those/such/the 8. as 9. than 10. in 11. of 12. across/beyond 13. went/came/traveled 14. them/these 15. of 16. into 17. by 18. with 19. life/living 20.differed

　　Exercise III:

　　1. with 2. have/hear/get 3. It 4. the 5. and 6. whatever 7. both 8. Thus

　　9. no 10. on 11. the 12. himself 13. so 14. is/becomes

　　15. instead 16.capacity 17. as 18. in 19. best 20.whether