_____some reason ,he didn`t attend the meeting ,but we don`t know the reason _____his being absent

题目

_____some reason ,he didn`t attend the meeting ,but we don`t know the reason _____his being absent
A.For ,for
B.For ,of
C.Of,of
D.Of,for
+原因!

答案

A
the reason for sth.后面要用for
for some reason出于某种理由