21. Without the Braille Alphabet, it would be very difficult for -------------------------.

      A. the disabled             B. the deaf                       C. the mute                         D. the blind

22. They gave a clear -------------------- of their intentions.

      A. demonstrate            B. demonstrative            C. demonstration          D. demonstrating

23. Her job is --------------------- of mentally retarded children in the area.

      A. looking                     B. taking care                  C. taking notice                 D. watching

24. Thuy’s class is different ------------------- other classes because the children are disabled.

      A. on                              B. from                             C. in                                     D. at

25. John is always late for class, ----------------------- annoys the teacher.

      A. which                       B. this                               C. what                                D. that