He didn't know A what's the matter B what the matter is C what was the matter D what the matter was

He didn't know A what's the matter B what the matter is C what was the matter D what the matter was
Somebody called you just now,but I didn't know
A who were they B who were they
C who was it D who it was
Could you tell me （）she is looking for?
Her cousin ,Susan
A that B whose C who D which
The small children don't know
A wht is their stockings B what is in their stockings
C where is their stockings in D what in their stockings