The boss appeared the accident and was not surprised at the news.A.to knowB.to h
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The boss appeared ______ the accident and was not surprised at the news.
A.to know
B.to have known
C.knowing
D.having known
试题答案
B
这题考查不定式的用法：appear后面可以接不定式的一般式，进行式，完成式，根据句意：老板似乎已经知道这个事故，一点不惊讶。选B。