286.
W: Hello, glad to see you. Come in, please.
M: Thanks. It looks like the party is exciting and all are in high spirits.
W: My brother, Tom is visiting me for the weekend.
M: Where is he?
W: He is sitting in the corner over there, and beside the yound woman.
M: And who is the yound woman? Uh, the woman wearing a red coat.
W: Oh, that's Ann, my piano teacher.
M: Piano teacher! I never knew you were practicing the piano.

答案解析：
(1) 正確答案為A。根據My brother, Tom is visiting me for the weekend.我哥哥湯姆周末過來看我。可知，女子的哥哥周末來看她，因此A項正確。
(2) 正確答案為B。根據Oh, that's Ann, my piano teacher. 哦，那是安，我的鋼琴老師。可知，安是女子的鋼琴老師，即女子跟安學鋼琴，因此B項正確。