Do you know these?

Do you know these? do you know these Do you know these people? _________ these girls do you know? Whose ___are these?Do you know? （ ）these girls do you know? Do you know()apple are these? Do you know the d____ between these words? Do you know the meaning of these sentences? 能力训练场----Do you know meaning of these sentences? But do you know 什么they learn all these things? Do you know the d( ) between these two words?