Exercise VII

1, happiness

2, height

3, depth

4, safety

5, length

6, width

7, sickness

8, sadness

9, thickness

10, difference

11, strength

12, difficulty

13, heat

14, oldness

15, youth

Exercise III

1, still is -> is still

2, don’t like -> doesn’t like

3, friend -> friends

4, dog -> dogs

5, cat -> cats

6, Their house  ->  Their houses; biger ->  bigger

7, live still -> still live

8, kilometer -> kilometers

VII,

1, happiness

2, height

3, depth

4, safety

5, length

6, width

7, sickness

8, sadness

9, thickness

10, difference

11, strength

12, difficulty

13, heat

14, oldness

15, youth

VIII, Ko rõ đề

III,

1,

still is → is still

2,

don’t like → doesn’t like

3,

friend → friends

4,

dog → dogs

5,

cat → cats

6,

Their house →  Their houses

    biger →  bigger

7,

live still → still live

8,

kilometer → kilometers