82. Some people can’t tell red _______ green, as there is a fault in their eyes.
a. byb. onc. fromd. over
83. When John woke up he was in the hospital, but he didn’t know how that had come ________.
a. aboutb. aroundc. byd. across
84. People who live in a small village are bound to see a good _______ of each other.
a. quantityb. amountc. deald. degree
请问选择哪个?为什么?谢谢!