单选题 Having been asked to speak at the conversation, ______.
A. some notes were prepared for Dr. Smith
B. Smith prepared some notes
C. the conversation members were pleased to hear Dr. Smith
D. some notes were prepared by Dr. Smith

【正确答案】 B
【答案解析】[解析] 考查知识点：现在分词的用法。句子的主语必须与现在分词短语的逻辑主语一致。译文：Smith应邀在会谈时讲话，所以他准备了一些笔记。