—Shall I attend my friend's comingofage ceremony, Mum?—No, unless you see to ________ that you will be home before 10:00 P.M.
He made another wonderful discovery, ______ of great importance to science.
Was it through Mary, _____ was working at a high school, ____ you got to know Tom?
Every time Ashtita tries to break a record, he reaches a point ______ he feels he cannot physically do any more.
The boy talked his mother ________ buying him a home computer.
When ______ about the secret of his success, Steven Spielberg said that he owes much of his success and happiness ________ his wife and children.