Ex1: Chọn các từ có trọng âm khác với các từ còn lại. 1.A. historical B. Classical C. Practical D. Technical 2.A. offical B. Legendary C. Historic D.iconic 3.A. electronic B. Biology C.photography D. Astrology 4.A. tsunami B. Evacuee C. Ecology D. Volcanic 5.A. competitive B. Possibility C. Curiosity D. Afternoon 6.A. positive B. Multimedia C. Verbally D. Netiquette 7. A.impolite B. Scientific C. Technology D. Economic 8.A. unfriendly B. Uncertain C. Untidy D. Unafraid Ex2: Chọn đáp án đúng. 1. Ellen finally ________ , apologizing for being late. A.got though B.showed up C.went on D.took off 2. Letters were a common ______ ò communication prior to the electronic age. A.skill B. Means C. Channel D. System 3. Science and technology are the key _____ economic and social development. A. For B. To C.in D. Of 4. John J. Stone-Parker came ______ the idea of creating a star- shaped device when he was 4 years old. A. Up with B. Down on C. Across with D. Away from