1. astronaut、policeman
   

2. strawberry、banana

3. eggplants、peppers

4. science、music

5. chicken、noodles

6. restaurant、train station

7. hair、shoulder

8. spring、summer

9. January、February

10. sunny、cloudy

11. third、fourth

12. walkman、cassette

13. computer 、keyboard

14. leopard、tiger

15. dress、shirt

16. mother、grandfather

17. pencil-box 、book

18. father‘s day 、Christmas

19. thin、young

20. hardly ever、never

21. on、under

22. car、bike

23. football、table tennis

24. jump、walk

25. yellow、green

26. flute、violin

27. kitchen、study

每一类都要两个同类词,谢了!