#5
First
Drosophila melanogaster group. Males can be recognise by the presences on one combe of teeth on the fore tarsi.
Second
Drosophila repleta group. Moutled appearance because of spots on mesonotum. Will have to run that one through the key.
#7
The second one appears to be
D. hydei. I cannot see if the tergites have pale lateral spots or not, but since the distal part of the first costal section is not darkened it should be that species.