Đề bài: mark the letter A,B,C,D on your answer sheet to indicate the word whose underlined part differs from the other three in the primary stress in each of the following questions ----- Nội dung dịch tự động từ ảnh ----- D. pollute D. happy 1. A. window B. city C. boring 2. A. absent B. cheerful C. Chinese D. future C. belong C. noisy C. exciting C. singer C. happy C. improve 3. A. expense B. effect 4. A friendly B. decide D. palace 5. A. president B. dangerous D. wonderful D. teacher 6. A. reduce B. garden 7. A. worker B. doctor D. receive 8. A. water В. apply D. allow