Prep 2-127,搜索过,没人问

The army cutworm moth is a critical source of fat for as many as a third of Yellowstone National Park's grizzly bears; they overturn rocks to find them, as many as 40,000 per bear in a single day.

(A) bears; they overturn rocks to find them, as many as

(B) bears; overturning rocks to find the insects, up to

(C) bears, overturning rocks to find them, as many as

(D) bears, and they overturn rocks to find them, up to

(E) bears, which overturn rocks to find the insects, as many as

正确答案E, 我的问题是 as many as 40,000 per bear in a single day做什么修饰成分?

定语修饰insects?

个人理解:

这里是find the insects的补足语

感谢 dingxiang,不过我再想想，前面有逗号，而且后面有per bear, 所以补足语好像不太令人信服。

insects的非限定性定语，补充解释insects。