Underline the short words If it is stressed

Underline the short words If it is stressed.
1. A: What are you thinking about?
    B: I’m thinking about how to get to Binh Ba Island.
2. A: Can you tell me where the food is served?
    B: This is the place where the food is served.
3. A: Look! He is a person I’m looking for.
    B: It’s not a person, but the person.
4. A: Do you think my essay is good?
    B: In general, you have good writing skill. However, you shouldn't put “and” at the beginning of a paragraph.
5. A: Who are you waiting for? 
    B: I’m waiting for my friends.
6. A: Which subject are you good at?
    B: I’m good at Maths.
7. A: What do you want from me?
    B: I want you to talk to me or I will cry.
8. A: Is this educational fair calling by volunteers?
    B: No. It is calling “for” volunteers, not “by” volunteers
Em cảm ơn trước ạ!