A、15. B、50. C、135. D、150. C信息明示题，女士说：“我们从原始名单中的150个名字中删去了15个名字”由此可以推断，参加聚会的人数可能有135(150减15)人，所以C正确，解答本题的关键是cross off 除去，取消)以及数字f

W: Have Todd and Lisa started a family yet? They’ve been married for two years now.
M: Todd indicated to me that they’d postpone having children until he gets his law degree.
Q: How do Todd and Lisa feel about children?

M: How many people will be coming to the party on Saturday?
W: We had to cross off fifteen names from our original list of one hundred and fifty.
Q: How many people do they expect to attend the party?