Present Perfect Passive Voice

The book  ____ already _____ discussed by the students

These documents _____ brought by your secretary.

My sister _____ given many sweets, she is happy.

The flowers _______ watered.

_____ the book been discussed in class? 

The homework ________ finished.

This bench _______ just been painted .

Dinner _______ cooked by Mary.

The cats ______ fed by mother.

The house ______ built. It is wonderful !

The new house _____ built by them.

_____ the task been done by you?