41. Everyone has/have finished his or her homework.
42. Each of the students is/are responsible for doing his or her work in the library.
43. The mayor as well as his brothers is/are going to prison.
44. The mayor and his brothers is/are going to jail.
45. Neither of the two traffic lights is/are working.
46. Either is/are fine with me.
47. Either my father or my brothers is/are going to sell the house.
48. Neither my brothers nor my father is/are going to sell the house.
49. Is/Are either my brothers or my father responsible?
50. Is/Are either my father or my brothers responsible?