II. Choose the word (A, B, C or D) whose main stress is placed differently from the others in each group.

3. A. attend /əˈtend/                            B. struggle /ˈstrʌgl/     

 C. reduce /rɪˈdjuːs/                           D. reward /rɪˈwɔːd/

4. A. chemical / ˈkɛmɪkəl /                  B. sociable / ˈsəʊʃəbl /

 C. illegal / ɪˈliːgəl /                          D. primary /ˈpraɪməri/