根据句意，用所给单词的适当形式填空。
Next Tuesday is my sister’s ____________(twelve) birthday.
In general, Chopin is a ____________(piano) of great ability.
Don’t forget ____________(turn) off the gas after cooking.
Of all the teachers in the school, Mrs. Smith is the____________(patient) with students.
Finally the firemen saved the little girl under the damaged building ____________(success).