问题
单项选择题
Professor Wang ,（）for his informative lectures, was warmly received by his students．
A.knowing
B.known
C.to be known
D.having known
答案
参考答案：B
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Professor Wang ,（）for his informative lectures, was warmly received by his students．
A.knowing
B.known
C.to be known
D.having known
参考答案：B