There/their/they're
We all had lunch at (their/there/they're) house.
We all had lunch at THEIR house.
Regardless of (who's/whose) cheese it is, Dylan is going to need to be given at least one small piece.
Regardless of WHOSE cheese it is, Dylan is going to need to be given at least one small piece.
(Who's/whose) birthday is it today?
WHOSE birthday is it today?
It is (too/to/two) early to know whether or not she won (too/to/two) prizes.
It is TOO early to know whether or not she won TWO prizes.
(There/their/they're) grandmother lived over (there/their/they're).
THEIR grandmother lived over THERE.
(Who's/whose) that person breaking in?
WHO'S that person breaking in?
(Who's/Whose) hungry?
WHO'S hungry?
Her sister was just (too/to/two) slow on the bike.
Her sister was just TOO slow on the bike.
(There/their/they're) mother likes to run marathons.
THEIR mother likes to run marathons.
Do you know (who's/whose) dog this is?
Do you know WHOSE dog this is?
I don't know (who's/whose) doing it.
I don't know who's doing it.
It is not sensible (too/to/two) eat (too/to/two) much sugar.
It is not sensible TO eat TOO much sugar.
(There/their/they're) not going to do (there/their/they're) homework because it is the weekend.
THEY'RE not going to do THEIR homework because it is the weekend.
(Who's/whose) going to the mall tonight?
WHO'S going to the mall tonight?
(Who's/whose) fries are those?
WHOSE fries are those?
We went (too/to/two) get candy from the store because it was on sale, but (there/their/they're) was not any left!
We went TO get candy from the store because it was on sale, but THERE was not any left.
(There/their/they're) not thinking about (there/their/they're) future plans.
THEY'RE not thinking about THEIR future plans.
(Who's/Whose) goals are we talking about?
WHOSE goals are we talking about?
All the Whos down in Whoville don't know (who's/whose) going to the Christmas party.
All the Whos down in Whoville don't know WHO'S going to the Christmas party.
The (too/to/two) of them had (too/to/two) much to eat and went (too/to/two) bed.
The TWO of them had TOO much to eat and went TO bed.