20 баллов !! решите пожалуйста.Задание:Complete the senyences using the correct form

20 баллов !! решите пожалуйста.
Задание:
Complete the senyences using the correct form of the words in brackets.

1)Travelling by plane is (save) way of travelling.
2) She is (serious) than her brother.
3)The (good) part of the holiday was the trip to the desert.4)
This year at college is a lot (difficult) than last year.
5)I don't play sports (frequently) as I used to.
7) I think younger people drive (dangerously) than older people.
8)She can't run (fast) as her brother.
10) The (friendly) people i know are the Americans.