1. Yesterday was not as hot as today.

2. Salim is the most beautiful in her team.

3. His house is the highest house in my city

4. No one in Mai's class is more intelligent than her.

5. Linh is younger than Mai 

Mai is older than Linh.

6.  That exercise is easier than this one

`1. `Today is hotter than yesterday.

`->` Yesterday wasn’t as hot as today.

`2. `No one in her team is more beautiful than Salim.

`->` Salim is the most beautiful in her team.

`3.` No house in my city is higher than his house.

`->` His house is is the highest house in my city

`4. `Lan is the most intelligent in her class.

`->` No one in her class is more intelligent than her.

`5.` Linh is 20 years old. Mai is 25 years old.

`->`Linh is younger than Mai.

`->`Mai is older than Linh.

`6.` This exercise is more difficult than that one.

`->`That exercise is easier than this one.