Choose the word whose main stress is different from the others

1.1. Choose the word whose main stress is different from the others.

1. A. character        B. adventure            C. library                 D. knowledge

2. A. discovery        B. calculator            C. aeroplane            D. difficulty

1.2. Choose the word whose underlined part is differently pronounced from the others.

1. A. buffalo            B. minority              C. gold                    D. close

2. A. honest             B. human                C. hero                    D. historian