补全对话。

A: Do you know we have a new teacher and two new students this term?

B: Really? What does the new teacher look      l      ?

A: He is an old man. He      2      no hair.

B: Is he bald?

A: Yes. And he      3      glasses.

B:      4      he have a mustache?

A: No, he _   5     a beard. He is not good looking, But he is very kind.

B: What      6     your new classmates? What      7     they __ 8     like'?

A: They are twins. They look the     9    .They    10    of  medium height. They're not heavy _  11     thin,

They _  12     curly hair.

B: What's the     13          14     their hair ?

A: Well, they     15      blonde hair. They are good-looking

论魏晋南北朝时期三省制的形成及其变化。