选择正确的答语，将字母编号写在括号内。
1. Amy: Is it your eraser, Sarah?
Sarah: [ ]
A. Yes, it is.
B. Yes, she is.
2. Sister: Where are the keys?
John: [ ]
A: No, they aren't.
B. Oh, they're in the door.
3. Mom: Where are you, Mike?
Mike: [ ]
A. I'm here, in the kitchen.
B. He is in the kitchen.
4. Tom: This is my home. We have a big living room.
Jack: [ ]
A. It's very nice.
B. Nice to meet you.
