Whose ___are these?Do you know?

Whose ___are these?Do you know? Do you know these? do you know these Do you know these people? Do you know whose kites they are? Do you know( A.is it whose pen B.whose pen is it C.whose pen _________ these girls do you know? （ ）these girls do you know? Do you know()apple are these? Do you know whose book this is 请问句子成分? 同义句 Do you know whose computer this is Do you know whose dictionary it is?(改同意句) Do you know----the