Difficult Animal Volunteer Interest14/20Pick out the word that has the primary stress different from that of the other words.DifficultAnimalVolunteerInterestGiải thíchĐáp án C Đáp án A /ˈdɪf.ɪ.kəlt/ Đáp án B /ˈæn.ɪ.məl/ Đáp án C /ˌvɒl.ənˈtɪər/ Đáp án D /ˈɪn.trəst/