Ⅰ. Listen and choose. 听录音，选择正确的答案。

1. — Who is the girl?
   — She is Mary.
2. — Are you N?
   — No, I’m not. I am K.
3. — Who is the boy?
   — He is Su Nan.
4. — Are you M?
   — Yes, I am. M is for milk.