III 

1,collecting

2,watching-going

3,doing

4,have collected

5,has expained

6,hasn't collected

7,have already readed

8,didn't

9,will eat

10,Have Alex ever been -been

11,are having

12,left

13,speaking

14,known-been

15,working 

IV

1,What's your hobby favourite?

2,How much time does he spend carving eggshells?

3,Who do you usually share your hobbies with?

4,What does she do when she goes to the doctor?

5,How many calories do people need to stay fit?

6,When did you start volunteering?

7,What are you doing so far?

8,When does your mother do charity work?

V

1, I love cold drink but i have sore throat

2,Jim eat to much fast food so he is overweight

3,Watch is television too much is bad your health

4,If you have a cold or the flu you shuold stay home

5,Alex loves fishing so he usually goes fishing in the lake near his house

6, Clean keeping yourself can avoid some disease by you

CHO MÌNH XIN  BEST ANSWER AND FIVE STAR !

CHÚC BẠN HỌC TỐT !!! :))))))))