In which sentence does the verb agree with the subject?

a.
don't he know the name of your cousin?

b.
aren't he moving to california in december?

c.
hasn't she left for the game already?

1.the hosts on two opposing mountains stood,  

2.thick as the foliage of the waving wood;  

3.between them an extensive valley lay,  

4.o'er which the gleaming armour pour'd the day,  

5.when from the camp of the philistine foes,

6. dreadful to view, a mighty warrior rose; in the dire deeds of bleeding battle skill'd,