Picture 1 =  Dialogue D
Mark read a really interesting book
on Central America.

Picture 2 =  Dialogue A
Matthew slept until noon.
He always sleeps in on the weekends.
(to sleep in o to sleep late: dormir más de lo usual) 

Picture 3  =  Dialogue B
Philip went to the swimming pool.
He's good at diving.

Picture 4  =  Dialogue C
Chris went shopping for some clothes,
but he didn't buy anything.