---Which of the following sentences is CORRECT?
#37977
A
I don’t know when will he come back tomorrow.
B
I have no idea when will he come back tomorrow.
C
I don’t know when he will come back tomorrow.
D
I have no idea when is he coming back tomorrow.
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Just as sound travels through the air in waves, electricity travels through the air in ______ radio waves.
#79301
A
what is called
B
which is called
C
what it is called
D
which it is called
I don’t understand ______ such a silly question in class yesterday.
#36523
A
why did John ask
B
why John asked
C
why is John asking
D
why John asks
After three hours'climbing，they reached ________ they thought was the place they'd been dreaming of.
#78845
A
what
B
which
C
where
D
that
I often doubt .
#39367
A
that this song is worth listening to
B
if this song is worth listening
C
that this song is worth listening
D
if this song is worth listening to
If you can’t find the place, I will show you _______.
#37833
A
what it is
B
what it was
C
where it is
D
where it was