单选题

We were discussing the housing problem when a middle-aged man cut in and said, "There's no point in talking about impossibilities."
A. intersect B. interject C. penetrate D. adulterate
【正确答案】 B
【答案解析】句意：我们正在讨论住房问题，这时一个中年男子插话了：“讨论不可能的事情是毫无意义的”。interject插嘴；intersect相交，交叉；penetrate穿透，渗透，洞察；adulterate掺杂。