1.It's a quarter_______ six..Let's go home

1.It's a quarter_______ six..Let's go home
Aof B in Cto D at
2.Hespeaks Japanese best_____-the boy students.
A betweenB withC among
3.He left home ____a cold winter eveing.
A at B onCin
4.How about ____the flowers now?
A watering B are wateringC watered