单选题 ______ that Bob had got promoted, his friends came to congratulate him.
   A) Heard            B) Having heard  C) Hear         D) To hear
【正确答案】 B
【答案解析】此题含义为：当听说鲍勃得到了提升，他的朋友们都过来祝贺他。现在分词的完成时作时间状语，表明hear的动作是发生在came之前。