大全849和一道lzm的对比

849看到很多人都讨论过了

1.        The Western world’s love affair with chocolate is well-documented: few people have been known to have tasted it for the first time without requesting more.

(A) few people have been known to have tasted it

(B) few having been known to taste it

(C) it has been tasted by few people

(D) few people have been known to

而有一道lzm，详见lzm99页6-7

lzm先讲了不定式后跟完成时表示该动作发生在谓语之前，具体题目是：

the fear of rabies is well founded: few people are known to recover from the disease after the appearance of the clinical symptoms.

答案是

B few people are known to have recovered from the diease once the clinical symptoms have appeared.

解题理由是recover这个动作在ｋｎｏｗｎ之前，所以用不定式加完成时

那么根据这个分析思路是不是大全８４９也该考虑考虑Ａ呢？

请ＮＮ指教！