He is looking forward __________his father.
It was rude ______ you to stare at the foreigner when he passed by just now.
The reason for his success is ______ he has worked very hard.
—Where is Bob? I cannot find him anywhere.—He have been off long. I heard him make a call just now.
_______ is known to us all is that Madame Curie, _______ life was devoted to science, wonthe Nobel Prize twice.
---Do you have anything in mind _______ you’d like for supper? ---Well, _______ is OK with me.