Ex 2

1.often sleeps

2.somtimes stays

3.always do

4.never come

5.does Johnson always get

6.Do you usually go

7.seldom cries

8.never has

Ex 5

1.doesn't study

2.has

3.have

4.doesn't study

5.teaches

6.likes

7.washes

8.don't have

Ex 6

My cousin, Peter (have) has a dog. It (be) is an intelligent with a short tail and big black eyes. Its name (be) is Kiki and it (like) likes eating pork. However, it (never/ bite) never bites anyone; sometimes it (bark) barks when strange guests visit. To be honest, it (be) is very friendly. It (not/ like) doesn't like eating fruits, but it (often/ play) often plays with them. When the weather (become) becomes bad, it (just/ sleep) just sleeps in his cage all day. Peter (play) plays with Kiki every day after school. There (be) are many people on the road, so Peter (not/ let) doesn't let the dog run into the road. He (often/ take) often takes Kiki to a large field to enjoy the peace there. Kiki (sometimes/ be) sometimes is naughty but Peter loves it very much.

=>

2/

1. Often sleep

2. Does he sometimes stay

3. Always do

4. Never come

5. Why does Johnson always get

6. Do you usually go

7. Seldom cries

8. Never has

5/

1. Doesn't study

2. Has

3. Have

4. Doesn't study

5. Teaches 

6. Likes

7. Washes

8. Don't have

6/

1. Has

2. Is

3. Is

4. Likes

5. Never bites 

6. Barks 

7. Is

8. Doesn't like

9. Often plays

10. Becomes 

11. Just sleeps

12. Plays

13. Are

14. Doesn't let

15.  Often takes

16. Is sometimes