Put the adjectives in brackets in the right form:
1) Mike is (tall) ...than John.
2) My dad is (old) ...than my mum.
3) She is the (happy) ...girl in the world.
4) Mary's English is(good)...than her French.
5) They are the (bad)...football players in our class.
6) The(cold) ...day last year was 20 Janiary.