问题补充:
He is known his being on time, so we don’t know the reason his being late this time.
A. for; of
B. as; for
C. for; for
D. of; of
答案:
A. for; of
(答案→)B. as; for
C. for; for
D. of; of
解析:考察介词,be known as一……出名,for为了,后面接名词性短语,表示原因。句意:他一直以守时出名,因此我们不知道他这次迟到的原因。故选B。