WHO"S/ WHOSE

__________ coming to the party?

Who's is a __________.

I don't know __________ coat that is.

Whose is a __________.

Okay, __________ completed their homework?

Who's means:

Alex___mother a Math teacher lives in London

___gonna cook dinner tomorrow?

 __________ already watched this show?

I don't know __________ been invited to the wedding.

 __________ your boss?

The person__you met after our meeting was my Big Cheese