Mary: Are these your friends, Liz?

Liz: Yeah, that's right. They're twins. Sally and Sandy.

Mary: Wow! They look exactly  the same.

Liz: Yes, and they even have the same daily routine

Mary: Really?

Liz: Well, they get up at six in the morning, and they wash face and have breakfast together.

Mary: Sounds interesting!

Liz: Yeah, they go to school together and go home together. And they go to bed at 11 together.

Mary: They are really the twins. I want to have a twin sister too!