Mark the letter A, B, C or D to indicate the word that differs from the other three in the position of primary stress in each of the following questions. 3. A. minor B. effect C. laundry D. natural 4. A. astronaut B. operate C. openness D. immersion Mark the letter A, B, C or D to indicate the underlined part that needs correction in each of the following questions. 5. Mr. Ahern said it is a challenging and important post at a historic point in the union's development. A. Mr. Ahern B. it is C. historic point D. union's development 6. The move would make the 61-years-old tycoon one of Britain's most generous benefactors. A. The move B. 61-years-old C. one of D. generous benefactors 7. One of the key site up for consideration is the space between the Town Hall and Laurence House. A. the key site B. for consideration C. is D. between