情景交际，选择恰当的句子，将序号写在横线上
A. Sorry, I can't. B. You're welcome. C. What's she doing? D. Where's Mum? |
Daming:____
Simon: She is in the kitchen.
Daming:____
Simon: She's cooking food for supper.
Mum: I am very busy now. Who can help me wash the dishes?
Simon:____I'm doing my homework.
Darning: I can help you, Mum.
Mum: Thank you, Daming.
Daming:____
