Supply the correct form of the word

Supply the correct form of the word.

      1.   Ms Huong is a ……………. teacher.                                                             (humor)

      2.   He will be very lonely unless you……………. him.                                      (friend)

      3.   I hate being around Mary Lou, she is …………….                                       (friend)

      4.   When you drive to work, you have to be extremely …………….                 (care)

      5.   An……………. is a home for children whose parents are dead.                   (orphan)