Use the correct form of the word in brackets to complete each sentence. 36. For years, King’s death remained …………………………….. . (explain) 37. Our help was ineffective. We are really ……………………………... (apology) 38. One of the …………………………….. of his management is his inflexibility. (weak) 39. She would try to do something special, something ……………………………... (stand) 40. He is considered to be one of the most famous …………………………….. of all times. (invent) 41. As a result of her good …………………………….., Lisa has a strong sense of responsibility. (bring) 42. As the day of the exam approached, he became …………………………….. nervous. (understand) 43. We like our staff to show their …………………………….. rather than wear a uniform. (individual) 44. Many students take courses to help with the …………………………….. of their knowledge. (rich) 45. It's ……………………to have so many people all trying to use this equipment at the same time. (practice)