Câu 6: Jean visits Dalat every two years to attend the Dalat Flower Festival. A. How often do Jean visit Dalat to attend the Dalat Flower Festival? B. How often does Jean visit Dalat to attend the Dalat Flower Festival? C. How long does Jean visit Dalat to attend the Dalat Flower Festival? D. How often does Jean visits Dalat to attend the Dalat Flower Festival? Đáp án của bạn: (A Câu 7: My father liked the of that singer. A. performer B. performing C. performance D. perform Đáp án của bạn: A Câu 8: I didn't walk to school when I was a student. A. I didn't use to walk to achool when I was a student. B. I don't use to walk to school when I am a student. C. I didn't use to walking to school when I was a student. D. I didn't used to walk to school when I was a student.