. What the doctors really doubt is ______ my mother will recover from the serious disease soon.
Don’t you know, my dear friend, ______ it is your money not you that she loves?
Someone is ringing the doorbell. Go and see ______.
“Where _______ go to work?” “Where _______ go to work is not known.”
None knows if _______ that boy, but if _______ him, her parents will be disappointed.
When ______ leave for Japan?” “When ______ leave for Japan is kept secret.”