He found his son________by letters and papers and________very worried.
A.surrounding；looked
B.surrounded；looked
C.surrounding；looking
D.surrounded；looking
网友回答
D解析这题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D。