单选题 15.  Our explanation seemed only to have ______ his confusion. He was totally at a loss as to what to say.
【正确答案】 B
【答案解析】 “结果我们的解释似乎增加了他的迷惑,他对我所说的完全不理解。”brought up教育,养育(孩子);提及……;added to增加,加强;worked out解决,解答;计算出;产生结果;发展;directed at旨在于;瞄准……目标。