1.Right ,wrong

2.Left, right

3.Cool, hot

4.Positive, negative

5.Him, her

6.Girl, boy

7.On, off

8.Win, lose

9.Black, white

10.Happy, sad

11. Bitter, sweet

12.Alone, together

13. Smart, dumb

14.Strong, weak

15.Big, small

16.Up, down

17. Dead, alive

18.Light, dark

19. Dry, wet

20. Horizontal, vertical

21.  Tall, short

22. Warm, cool

23.  Top, bottom

24.Yes, no

25.  Open, close