B
1.the busiest
2.the largest
3.the biggest
4.worse
5.best
6.oldest
7.richest
8.the highest
C
1c
2b
3b
4a
5a
6c
7а
<span>usual-unusual</span>
pleasant-unpleasant
possible-<span>impossible
</span>polite-impolite
correct-
<span>incorrect</span>
My mum seldom uses computer
He came back from Paris On Sunday
This mobile is very expensive
James talks slowly
They are staying at their friends house tonight