____ some teenagers don’t realize is ____ difficult life can be after they get addicted to drugs.
In some countries citizens are ______ to vote, and if they don’t they get fined.
We’ve been looking at houses but haven’t found ______ we like yet.
______is known to us all, only the theory ______ on practice can be practical.
Mary’s teacher recommends she ______ the post in the company.
I think my friend Tony is ______ to win the tennis game next Monday.