Question

My car isn't very big ( buy-big)
You should buy a bigger car

1- this armchair is not very comfortable (buy-comfortable)
2- I don't like to live on the ground floor ( live- high)
3- I don't like this cold room (go- warm)
4- this room is too dark to read ( read-light)
5- the fireman hurt his arm ( be- careful)
6- Jenny can't write very fast ( try - fast)
7- our classroom isn't large enough ( study-large)
8- she's too young to date( be-old)

Answer 1

1- You should buy a more comfortable armchair

2-You should live on a higher floor

3-You should go to a warmer room

4- You should read were there is light

5- The fireman should be more careful

6- Jenny should try writting faster.

7- We should study in a larger classroom

8-She should be older to date

Answer 2

1) This armchair is not very comfortable.
    You should buy a more comfortable armchair. 

2) I don't like to live on the ground floor.
    You should live on the higher floor.  

3) I don't like this cold room.
    You should go to a warmer room. 

4) This room is too dark to read.
    You should read in a lighter/light room.

5) The fireman hurt his arm.
    He should be more careful.

6) Jenny can't write very fast.
    She should try to write faster.

7) Our classroom isn't large enough.
    You should study in a larger classroom. 

8) She's too young to date.
    She should be older to date.