Subject Object Pronouns and Point of View

I went to the mall. 
Does this sentence have a subject or object pronoun?

• Subject Pronoun
• Object Pronoun

He bought groceries to eat for dinner.
Does this sentence have a subject or object pronoun?

• Subject Pronoun
• Object Pronoun

Don't mess with them.
Does this sentence have a subject or object pronoun?

• Subject Pronoun
• Object Pronoun

They completed all of their homework.
Does this sentence have a subject or object pronoun?

• Subject Pronoun
• Object Pronoun

Katie helps you study all the time.
Does this sentence have a subject or object pronoun?

• Subject Pronoun
• Object Pronoun

It is the coolest game ever.
Does this sentence have a subject or object pronoun?

• Subject Pronoun
• Object Pronoun

Mrs. Hunter told her to listen.
Does this sentence have a subject or object pronoun?

• Subject Pronoun
• Object Pronoun

The teacher didn't give us homework.
Does this sentence have a subject or object pronoun?

• Subject Pronoun
• Object Pronoun

Lisa is going to work on the project with me.
Does this sentence have a subject or object pronoun? 

• Subject Pronoun
• Object Pronoun

Mom told us to leave it alone. 
Does this sentence have a subject or object pronoun?

• Subject Pronoun
• Object Pronoun