Do you have any idea ______ is actually going on in the classroom?

That's ___ you are wrong． You skipped Step Two

---- ______ would you like to have?---- Nothing else. Thanks.   

Tom sacrificed his personal life ________ he could get ahead in his career.

— Was it not until last week ______ he decided to give up smoking?— No. He began _____ he saw the new film last month.