----- Nội dung dịch tự động từ ảnh ----- 16. _have you give up smoking? For about two years. A. How B. How long C. When 17. _place is more densely populated – Ha noi or Ho Chi Minh City? C. Which _broke Jane's favorite vase? Her brother did it. C. Whom does Mr. Brown do? He's a reseacher. C. Why is your grandmother? She's ninety years old. A. What B. Where 18. A. Who B. Whose 19. A. Who B. What 20. A. How B. How old C. Who
