主动语态：They say that he knows some very influential people.
对应被动语态：He is said to know very influential people.
主动：They say that he knew some very influential people.
对应被动：He is said to have known some very influential people
所以你这句没有上下文的情况下2个答案都可以。
第一个对的
首先be said是据说的意思，结合整个语境，我选C
这个题选择B。
此题考察的是完成时态！
现在完成时态表示过去的动作对现在的影响或是一直持续到现在！
如果没有前面半句话的话，就选A。
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