问题补充:
单选题Hefoundhisson________bylettersandpapersand________veryworried.A.surrounding;lookedB.surrounded;lookedC.surrounding;lookingD.surrounded;looking
答案:
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。