单项选择题
M: Where did you put my new red tie
W: It’s right there in the cupboard with your other ties.
M: There’s a green one and a couple of brown ones, but no red one.
W: Here it is in your drawer. You must have put it there when you brought it home.
M: I suppose so. We’d better hurry up or we’re going to be late. The Smiths said to come at 7:00.
W: Oh, it’ s 6:24 now. Sue isn’ t here to take care of the children yet.
M: She shall be here at 6:40. That still gives us time to get there.
W: Who else is coming tonight
M: The Browns and the Franks. And Mrs. Johnson’s sister will be there too.
W: Well. I think we’d better go down. Sue should be here pretty soon.
A．She is Mrs. Johnson’s sister.
B．She is the person to look after their children.
C．She is the speakers’ guest.