Ex 11:
1. There are many beautiful beaches in Vietnam.
2. Minh is the tallest student in my class.
3. The museum is in front of the hospital.
4. Lan's house is more expensive than mine.
5. Kien is Mr.Hung's son.
Ex 12:
2. A.beautiful
3. C.more interesting
4. B.bigger
5. D.most dangerous
6. C.better
7. A.richest