【正确答案】
C
【答案解析】[听力原文]
M: Where are you living now, Mary?
W: We are living on Main Street.
M: Do you like your new house?
W: Yes, we do. At first, we meant to buy a one-storey house.
M: Do you mean you are now living in a two-storey house?
W: Yes, and we prefer that way.
M: Do you have a nice yard?
W: Of course. Although it's not very big, we have enough room for flowers.
M: You enjoy gardening, don't you?
W: Yes, I do. And my husband does, too. We like to have roses in the yard.
How many storeies does Mary's house have?