Answer
1A: What are you doing on Saturday? Nothing, Mom. Why? B: Everyone is on vacation. There's no one to hang out with. A: We can go somewhere if you want.
2A: What should I buy for Dad for Christmas? B: You should buy a book. A: Should I buy socks too? B: No. Everyone buys him socks!
3A: Is everything okay? B: No. I'm feeling sick. A: You should stay in bed and not go to school today.