A、One. B、Two. C、Three. D、Four. BHow many stories does Mary’s house have? 本题为数字题。从对话中living in a two-story house可以确定答案。

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-story house.
M: Do you mean you are now living in a two-story house?
W: Yes. And we prefer that way.
M: Do you have a nice yard?
W: Of course. Although it is 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.