Помоги те пожалуйста)))
Надо вставить in,on,at
3. Did you hear the doorbell? There is somebody.....the door.
4. She is doing her homework........her desk

Впиши недостающее слово в паре.                         

room- ---------------------

------------------------------  -   boxes

fox - ----------------------------

---------------------------------   -    horses

hen- ---------------------------

----------------------------------------   -  letters