look into next to show up line with deficient in compatible with take off bring into play run down after all be concerned with be associated with 
【正确答案】：19. next to 20. line with 21. bring into play 22. After all 23. be associated with 24. were concerned with 25. looking into 26. compatible with 27. take off 28. deficient in 29. show up 30. running down