56. Which of the following sentences is INCORRECT? ( )

55. ( ) he wanted to go out with his friends at the weekend, he had to stay behind to finish his assignment.

54. Men differ from animals ( ) they can think and speak.

53. Nine is to three ( ) three is to one.

52. Had Judy been more careful on the maths exam, she ( ) much better results now.

51. Our association, which has consistently pressed for greater employment opportunities for tN disabled, will publish ( ) proposals in the near future.

80. Mary sat at the table, looked at the plate and ( )her lips.

79. Doctor often ( )uneasiness in the people they deal with.

78. We stood still, gazing out over the limitless ( )of the dessert.

77. Thousands of ( )at the stadium came to their feet to pay tribute to an outstanding performance.

76. According to the new tax law, any money earned over that level is taxed at the ( )of 59 percent.