The use of this and that I'm sentence

- "This is a great book."

- "That dog is so cute!"
- "This is my friend, Sarah."
- "I didn't see that coming."
- "This is the best pizza I've ever had."
- "That movie was amazing."
- "I need to buy this shirt."
- "I don't like that song."
- "This cake is delicious."
- "That car is so expensive."