report due
d what does report due mean in this sentence?
Phibi: I need a atlas
Monika: why? do you have a report due?

Question

Answer

It means that Monika us asking Phibi Why does she need the atlas? does she need it because she has to submit a report? ( an assignment?) 
Monika is assuming that Phibi needs to refer the atlas to work on her report.
Hope this helps.:)

Answer

'due' is for a scheduled thing that is coming up, eg: His train is due in at 7:50,   or  Her baby is due on the 29th.
:)