I. Write in correct English 1. We didn*t try hard enough since the second semester 2. I have know this singer since she has been 16 year old 3. People enjoyed Beethovan*s music for nearly 200 years 4. The boy played soccer since 2 o*clock 5. All my classmates knew each other quite well since they were in grade 6 6. These dancers performed that ballet qute well many times 7. Lan has met her old friends two days ago 8. Phong didn*t see that film before 9. His sister played piano since she was eight 10. They didn*t see each other for a long II. Đặt câu hỏi cho từ / cụm từ bị gạch chân 1. They do their homework at night ( their homework , at night ) 2. Mr. Robinson came to the party alone ( Mr.Robinson )