28. —Has your sister finished her novel yet?—I have no idea.She________it last week.
You can only be sure of_________ you have at present; you cannot be sure of something _____ you might get in the future.
Why not try your luck downtown, Bob? That’s ______ the best jobs are.
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.