1. There
   Their
2. They're

Whose feet? Their feet! This is the possessive.

1. There
   Their
2. They're

This refers to a place. It's like "here," but with an extra T.

1. There
   Their
2. They're

Who's going to the party? They are! Hence, "They're going to a party."

1. There
   Their
2. They're

Whose father? Their father!

1. There
   Their
2. They're

They are very nice people, you know!

1. There
   Their
2. They're

It's a place, so it's "there".

1. There
   Their
2. They're

Whose meat? Their meat! They like it well done, which is some may say is a bad call - but at least they can spell it.

1. There
   Their
2. They're

This isn't a physical place, but it's still a "there."

1. There
   Their
2. They're

Who is opening? They are opening!

1. There
   Their
2. They're

They are giving a gift to the world. So it's their gift.

1. There
   Their
2. They're

Here we see "there" in the sense of "voila" or "there you go." It's a slightly different use but still valid.

1. There
   Their
2. They're

Who is in possession of stolen goods? They are!

1. Their, there
   Their, they're
2. There, their
   They're, there

Location and then possessive makes this, "There I was in their bathroom." You'll notice this quiz just got harder... and it's going to get harder again in a minute!

1. There
   Their
2. They're
   None!

There's no other mysterious spelling of "there" out there: we just threw in the any/none options to see if you would be deceived!

1. They're, their
   Their, they're
2. They're, they're
   There, their

Who is going to get just desserts? They are. Whose desserts are they? Theirs. Hence, "They're going to get their just desserts."

1. They're, their
   There, they're
2. They're, there
   Their, their

By going to that place or idea, or "there," they are (they're) making a big mistake. Hence, "By going there, they're making a big mistake."

1. Their, there
   There, their
2. Their, their
   They're, their

The sister belongs to them and the location is under discussion. Hence, "Why isn't their sister going there for Christmas?"

1. Their, their
   There, there
2. They're, they're
   They're, their

The beds belong to them, hence their beds. They are the ones making the beds, hence they're making. "They're making their beds right now."

1. They're, their
   Their, there
2. There, their
   They're, they're

They are the ones who are bright (or not), and the opinion belongs to them. Hence, "They're not very bright, so don't trust their opinion."

1. They're, they're
   Their, there
2. There, there
   They're, their

They are the ones being successful and the investors belong to them, hence, "If they're successful, their investors will be rich."

1. There, they're
   There, there
2. Their, their
   Their, they're

The minds belong to them, and they're the ones who are moving. Hence, "Their minds are made up; they're moving to California."

1. Their, they're
   Their, their
2. They're, their
   There, their

The preference and the designer both belong to them, so it's the same each time: their. "Their preferred option is to use their in-house designer."

1. Their, their
   They're, there
2. They're, their
   Their, there

They are the ones building the house, and it is located there. Hence, "They're building a new house there."

1. They're, their
   There, their
2. They're, they're
   Their, their

The house belongs to them, and they are the ones who are grounded. Hence, "If they're grounded, they'll be at their house."

1. Their, their
   They're, there
2. Their, there
   They're, they're

Who's over where? They are over there. Hence, "They're over there."

1. There, there, there
   There, they're, their
2. They're, they're, they're
   Their, they're, there

That's right, all three are the same here. They are kind, they are calm, and they are the sort of people you want around in a crisis. Hence, "They're kind, they're calm, and they're the sort of people you want around in a crisis."

1. Their, their, there
   They're, their, there
2. They're, they're, there
   None of these options is correct and this sentence is nonsense!

They are the ones building, the house belongs to them and we know it's down there. So, "They're building their new house down there."

1. There, there, their
   They're, their, there
2. There, they're, their
   Their, they're there

At that place (there), they know they are (they're) seen as more than the sum of parts that belong to them (their). That gives us, "There, they know they're seen as more than the sum of their parts."

1. Their, their, there
   There, there, there
2. Their, they're, their
   Their, they're, they're

Yep, it's all the same again! We're talking about one place, which is always "there," which means we get, "If you go there, you could get stuck there, and it sucks there."

1. They're, their, their
   Their, there, there
2. Their, they're, their
   They're, their, there

They are the ones who are not interested (they're), these friends belong to them (their), and there is a place under discussion (there). Hence, "They're mostly not interested, but some of their friends might want to go there."

1. There, there, there
   Their, their, their
2. They're, their, their
   They're, they're, there

The looks, the poise, and the elegance all belong to them. Hence, the possessive "their" shows up three times, to give us, "I admired their looks, their poise, and their elegance."

1. Their, their, they're
   They're, their, there
2. They're, their, they're
   Their, they're, their

They are (they're) the ones who are a certain type of selves. The best selves belong to them (their). They are under pressure. Hence, "They're definitely their best selves when they're under pressure."

1. They're, they're, they're
   Their, their, their
2. There, there, there
   They're, their, they're

They are the ones counting, and the chickens belong to them. That gets us, "They're counting their chickens." However we then consider who is hatching, and of course the answer is that the chickens are doing that. So we get another "they're," but referring to the chickens, for a resulting sentence that goes, ""They're counting their chickens before they're hatched."

1. Just put "there" in all of them with the second one in quotes.
   It can't. This is gibberish. Gibberish, I say!
2. There are about four options, actually.
   It can't be a sentence without more punctuation.

"Is there any 'there' there?" is a common way of asking whether there is any substance to the matter at hand. It comes from the idea of investigating, as in ,"There's nothing there," or "There you go, there's something." If there is in fact something there, that can be referred to as "there" in this context. Hence, "Is there anything there" becomes colloquially turned into, "Is there any 'there' there?"

1. Their, they're, there
   There, there, there
2. There, there, they're
   This is not a sentence!

Saying "there, there" is a slightly archaic way of showing sympathy. When someone is upset, you might say. "There, there, it'll be better soon." It's a way of saying something rather than just sitting there in silence. So in this case, clearly the only way to make a meaningful sentence is to deploy this particular figure of speech to fill the first two gaps. Then we reach the third gap, where we can see they are (they're) jealous. This gives us, "There, there, they're probably just jealous of you."