Do you know the man speaking at the meeting?
Do you know the student____was praised at the meeting?
do you know the problem at the meeting yesterday
the man speaking at the meeting is a professor___ mathematic
jack,do you know the man standing at the door?
do you know the man ( )?
Do you know where the meeting
Do you know who will speak at the next _____ (week) meeting?
Do you know the man ( )(call) David?
Do you know the man ( ) just now
Ben do __(you) know the man standing at the door Yes __ (I)
最后期限了 Do you know the tallest man Bill is talking to at the
请问:Do you know the man who stood at the corner?