This is the very reason ________ he explained to me just now．
This is the very reason ________ he explained to me just now．
A.why
B.that
C.for which
D.of
答案及解析： B
解析：
that在定语从句中作explained的宾语．
This is the very reason ________ he explained to me just now．
A.why
B.that
C.for which
D.of
答案及解析： B
解析：
that在定语从句中作explained的宾语．