1. To/Too/Two: "I want to go to the store." "That's too much food." "I have two cats."
2. There/Their/They're: "Look over there!" "That is their car." "They're going to the beach."
3. Here/Hear: "Come here!" "I can hear you."
4. See/Sea: "I can see the ocean." "The sea is vast and blue."
5. Write/Right: "Please write a letter." "You are right about that."