根据情景, 选句子完成对话。
(下午, Sarah带同学Mike回家, 把他介绍给妈妈, 然后两人相约一起画画。)
Sarah：Mum, this is Mike. ____
Sarah's mum： ____
Mike：Good afternoon. ____
Sarah's mum： ____
Sarah： ____
Mike： ____
A. OK!
B. Mike, this is my mum.
C. Good afternoon, Mike.
D. Nice to meet you.
E. Let's paint.
F. Nice to meet you, too.
