Section 4:

1, Although

2, despite

3, In spite of

4, although

5, in spite

6, Although

7, despite

8, although

9, Despite

10, although

Section 5:

1, boring

2, bored

3, depressing

4, depressed

5, interesting

6, surprising

7, confused

8, boring

9, amused

10, surprised

Section 6:

1, eating; peeling

2, makes

3, will buy

4, took

5, is playing

6, go

7, was

8, will have

Section 7

1, Careful -> carefully

2, in -> on

3, came -> come

4, healthful -> healthy

5, play -> player

Section 8

a

1, happily

2, lucky

3, hard-working; hard

4, quickly

5, quietly

6, fluently

b 

1, lazier

2, slower