Mark the letter a, b,c or D on your answer sheet to indicate the word that differs from the other three in the position of the primary stress in each of the following questions

Mark the letter a, b,c or D on your answer sheet to indicate the word that differs from the other three in the position of the primary stress in each of the following questions 
5. a.Collector b.library c.usually d.buffalo
6. a.altogether b.souvenir c.definitely d.overseas 
I I. Identify the mistake in each sentence 
1.La Tomatina is a annual festival to celebrate the tomato harvest.
                          ---  ------               --------------                      ----------
                         A      B                       C                                  D