Complete the sentences with the correct prepositions.
1) He is very loyal _____ his friends/
2) Do you feel optimistic _______ the future?
3) Where`re all very proud ______ you.
4) I`m feeling really annoyed ______ my brother.
5) She isn`t very good _______ chess.
6) Are you afraid ______ spiders?
7) They aren`t accustomed _____ the climate.
8) I`m tired _______ waiting.
9) Who is responsible ____ this mess?
10) She`s very depressed _______ her exam results.