Passive Voice

They feed the seals at the zoo twice a day.

(a)  

The author has written a special addition for children.

(a)  

Students are doing a lot of work.

(a)  

We hope they will send us an invitation.

(a)  

They will have built the new bridge by the end of the year.

(a)  

The detective had collected all the information by then.

(a)  

Who will make the speech?

(a)  

The scientist were doing the experiment.

(a)  

They sell designer clothes in this shop.

(a)  

Has Ann read the book yet?

(a)