Examination compositions, together with most business letters and government reports, are the main situations ________ formal language is used.[ ]

He was lost in the busy streets. But atlast it was _______ of him to find the way home.

When it comes to sports passion, nothing _______the craziness in fans more than football.

If you had finished your homework yesterday, you _____ home now.

Does the bike belong to_________ —No, it is ___________.