11.   She filed a complaint against several of her colleagues.

12.   The man has lodged a formal complaint against the police.

13.   The president of a small environmental group has filed an ethics complaint against Republican Sen.

14.   They lodged a complaint against the doctor for negligence.

15.   Voice over One complaint against step aerobics has been the number of unqualified people taking the classes.

16.   You had to turn your complaints against the individuals who manned its higher echelons.

17.   All complaints against police officers are carefully investigated.

18.   A number of them have filed formal complaints against the police.