I must find out why____so many students made the same mistake. 
#84856
A
is it that
B
was it which
C
it is what
D
it was that
推荐题目
Is it in this room in _____ the great writer once lived ____ he finished his last works?
#85036
A
which; that
B
that, where
C
that; which
D
where; that
________she is not so healthy _______she used to be?
#85321
A
Why is it that; what
B
Why it is that; that
C
Why is it that; as
D
Why it is that; who