There's no way of knowing why one man makes an important discovery________another man,also intelligent,fails.
It is none of your business ________ other people think about you.Believe yourself.
—Where's that report? —I brought it to you ________you were in Mr.Black's office yesterday.
You can only be sure of ________ you have at present; you cannot be sure of something ________ you might get in the future.
Could I speak to ________ is in charge of International Sales,please?
The traditional view is ________ we sleep because our brain is “programmed” to make us do so.