56. The bus came at last after they waited for 2 hours.

55. Ms Smith lent me two books yesterday.

54. Don’t talk loudly in public. You made a lot of noise.

53. You’ve made great progress in English.

52. She used to visit her family monthly.

51. Don’t make a mess in your bedroom.

50. Many people walked past the shop but nobody noticed the trash bin.

49. Do the students in your class obey your teachers?

48. Perhaps he is the new principle of our school.

47. Nobody mentioned it to me.