some of the questions ,the man said good-bye to us.
A. Leave;unanswered
B. Leaving;unanswered
C. Left;to be answered
D. Leaving;unanswering
网友回答
A. Leave;unanswered
(答案→)B. Leaving;unanswered
C. Left;to be answered
D. Leaving;unanswering
解析：根据句子结构，第一个空应该使用现在分词作状语。再根据宾语the questions和宾补unanswered的逻辑关系判断，宾补应该使用过去分词形式表示被动。