—I can’t find Mary. Where’s she?—Sorry, I don’t know ______.
#38998
A
where has she been
B
where she has been
C
where has she gone
D
where she has gone
推荐题目
Do you know the man _______? 
#37129
A
whom I spoke
B
to who spoke
C
I spoke to
D
that I spoke
--Which of the following sentence is right?--I wonder _________.
#38064
A
who broke the window
B
whose pen is this?
C
which room I will live
D
what’s the population of China