=>
IV/
1. My sister did not buy a Toyota and I didn't either.
2. They won't work all week long and I won't either.
3. My dog does not have black tail and neither does my cat.
4. Her homework isn't finished and my homework isn't either.
5. The teacher doesn't explain very well and neither does my mother.

VI/

a/
1. happily
2. loudly
3. fluently
4. angrily 
5. carelessly 
6. awfully
7. wonderfully
8. well

b/
1. correctly/correct
2. quickly
3. exactly
4. dangerous
5. dangerous
6. beautiful
7. sensible/sensibly
8. softly
9. well/carefully
10. careful

VII/
1. a lot of
2. a lot of
3. too much
4. too much
5. a little
6. too much
7. much

VIII/
1. We must remember to eat sensibly.
2. Would you like to have dinner at my house tonight?
3. You ought to wash the vegetables more carefully.
4. What is wrong with Lien?