Đánh dấu trọng âm và khoanh đáp án đúng ----- Nội dung ảnh ----- REVISION: STRESS I. Choose the word whose main stressed syllable is placed differently from that of the others in each group. 1. A. welcome B. upstairs C. difficult D. challenge 2. A. melody B. pottery C. fragile D. unusual 3. A. essential B. monopoly C. reporter D. unusual 4. A. favourite B. flower C. exciting D. gardening 5. A. affect B. language C. character D. adventure 6. A. anniversary