$\text{⇒ Answer:}$
$\text{1. The dog is usually fed (by mother).}$
$\text{2. The eggs have been eaten (by the little girl).}$
$\text{3. Soccer is played all over the world (by people).}$
$\text{4. The mail was brought (by the postman) early today.}$
$\text{5. A song wasn't being sung (by Alex) when the doorbell rang.}$