I didn’t know  ________.
#38751
A
when did the plane take off
B
when the plane took off
C
when the plane takes off
D
when does the plane take off
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
The policeman asked Mr. Smith       .
#37201
A
what did his car look like
B
how was his car
C
how his car looks
D
what his car looked like
I didn’t know  ________.
#38751
A
when did the plane take off
B
when the plane took off
C
when the plane takes off
D
when does the plane take off