题目内容
They are in ____ but in ____.
| A．same grade; different classes |
| B．the same grade; different classes |
| C．same grades; different class |
| D．the same grades; different class |
B
解析试题分析：句意：他们在同一个年级，但在不同的班级。Same同样的，其前面常加定冠词the。Different不同的，与same意义相反，其前面通常不加冠词，后面常跟复数名词。所以选B。
考点：考查形容词的用法。
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