【题目】He found his son _______ by letters and papers and _______ very worried.
A. surrounding, looked B. surrounded, looked
C. surrounded, looking D. surrounding, looking
在线课程【答案】C
【解析】考查分词做宾语补足语的用法：his son和surround之间是被动关系，所以用过去分词，和look是主动关系，所以用现在分词,句意是：他发现儿子被信和论文包围着，看上去很担心。选C。