All the participants were asked to tie their right leg to their spouse's left leg for the race.
In the above sentence, point out the gender of the word 'spouse'.

He became rich overnight. What part of speech is 'overnight'?

The nightingale is a singing bird. In this singing is a/an --

I Came home after the rain -----.

The Doctor took the round in the hospital. Here 'round' is a/an ---

Alumni is the plural from of