$\text{11.Have the Chirstmas cards been sent to your family?}$
$\text{12.Alice was appointed secretary for the meeting.(by the committee)}$
$\text{13.The broken cup is hidden in the drawer.(by him)}$
$\text{14.This room is kept tidy(by them)all the time.}$
$\text{15.The party was voted a great success.(by them)} $
$\text{16.Ann was given Ann some bananas and some flowers. (by us)} $
$\text{17.he fridge was moved into the living room.(by them)}$
$\text{18.Some cups of tea were bought to the visitors in the next room.(by her)} $
$\text{19.The new project is found worthless.} $
$\text{20.The note wasn't taken to the manager.(by the secretary)}$