A US report predicts that in 15 years' time the economy in Asia will be larger than ________ of North America and Europe combined.
Everyone knows, perhaps except you, _______ your girl-friend is a cheat.
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.