Rewrite the sentences so that their meaning stays the same

V.  Rewrite the sentences so that their meaning stays the same.

      1.   Michael is faster than his brother.

            Micheal’s brother .....is thinner than Micheal...............

      2.   The winter is the coldest season.

            No season .....is colder than the winter........

      3.   Our sources of energy will soon run out if we don’t try to save them.

            Unless ......................................................................................

      4.   Barbara plays chess better than Mike.

            Mike doesn’t .....play chess better than Barbara...........

      5.   There are too few glasses for everyone to have a drink.

            We haven’t got .............