一、1-5 A C A C D
    二、6. monkeys 7. carefully 8. noisy 9. Wednesday 10. finishes
    三、11. is swimming 12. healthier 13. flew 14. eating 15. is going to give
    四、16-20 C C A D A 21-25 C D C C D
    五、26-30 E D A B C
    六、31-35 B A B C D 36-40 B A D A C
    七、41-45 B D C A B
    八、46. Australia 47. From Monday to Thursday 48. Two hours and fifteen minutes
    49. $2.60 50. Five minutes' walk
    九、1. walk 2. more 3. slowly 4. until 5. worried
    6. reading 7. things 8. answers 9. laughed 10. new