求教各位大神关于what it appears 的用法，有具体题目，解答者好人有好报！！！

jh709126

Researchers in Germany have unearthed 400,000-year-old wooden spears from what it appears
was an ancient lakeshore hunting ground as stunning evidence of human ancestors who
systematically hunted big game much earlier than believed.

(A) it appears was an ancient lakeshore hunting ground as stunning evidence of human ancestors
who
(B) it appears had been an ancient lakeshore hunting ground and is stunning evidence that human
ancestors
(C) it appears to have been an ancient lakeshore hunting ground and is stunning evidence that
human ancestors
(D) appears to be an ancient lakeshore hunting ground, stunning evidence that human ancestors
(E) appears that it is an ancient lakeshore hunting ground, stunning evidence of human ancestors
who
我想问一下，关于a选项What从句中出现what和it两个主语，以及appears和was两个谓语，句子结构错误，
但是我看有其他的题说what it appears 里面的it appears 可以当作插入语使用，所以如果在这里 it appears 理解成插入语去掉的话a岂不是就是对的了？
谢谢～

jh709126

后来我自己想了一下算是明白了，it appears 做插入语的时候只能是what it appears to be ,而本来题目的话多了一个is 所以不行，
我觉得我的认为的应该是正确的，同学们小心哈

jh709126

但是问题又来了。。。。The electronics company has unveiled what it claims is the world's smallest network digital camcorder, which is as long as a handheld computer and weighs
为什么这个句子就是对的？
这个句子和我po的第一句话类似呀，为什么不说这里面有两个主语和谓语了？

jh709126

The electronics company has unveiled what it claims to be the world's smallest network digital camcorder, the length of which is that of a handheld computer, and it weighs less than 11 ounces.
Ato be the world's smallest network digital camcorder, the length of which is that of a handheld computer, and it weighs  分析A选项
Bto be the smallest network digital camcorder in the world, which is as long as a handheld computer, weighing  分析B选项
Cis the smallest network digital camcorder in the world, which is as long as a handheld computer, and it weighs  分析C选项
Dis the world's smallest network digital camcorder, which is as long as a handheld computer and weighs  分析D选项
Eis the world's smallest network digital camcorder, the length of which is that of a handheld computer, weighing  分析E选项
就是这道题，正确答案是d可以帮我分析下么？

jh709126

大神门帮我一下吧？真的谢谢了！

1010805556

很明显呀。你见过：it claims that sth。 is。。。。
你见过it appears that sth。 is 吗？
。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。重点来了：appear是不及物动词，claim是及物动词。明白了吧~