мне нужны ответы. 40 пунктов :)  за решение. 

#3

usual - unusual
pleasant - unpleasant
possible - impossible
polite - impolite
correct - incorrect

#1

1 - c)
2 - b)
3 - a)
4 - b)
5 - a)

#2

1) He is interested in history.
2) She is kind and understanding.
3) We try to spend our free time together.
4) In the evenings, we like playing board games.
5) Would you like to come to us during the next summer holidays?