----- 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