1.Minh looks (thin)_____ than he did.
=>Thinner
2.Mountains are (big)_____than hills.
=>Bigger
3.School days are (happy)_________of my life.
=>Happiest
4.Who is (good)_____,Tom or Tim?
=>Better
5.The air in the city is much (dirty)_________than that in the country.
=>Dirtier
6.The Mekong River is the (long)________river in Vietnam.
=>Longgest
7.My sister is (old)_____than I.
=>Older
8.Nam is (short)__________than Ba. He is the (short)_______in his class.
=>Shorter......... shortest
9.Your house is (large)___________than my house.
=> Larger
10.It is the (modern)___________building in this city.
=>Most modern