问题补充：
The students are doing the cleaning in their classroom. Some are cleaning the windows and the doors, are sweeping the floor.
A. another
B. the other
C. the others
D. other
答案：
A. another
B. the other
(答案→)C. the others
D. other
解析：句意：学生们正在打扫他们的教室。有的在擦玻璃和门，其他的在扫地。分析介绍的学生分成两部分，两部分中的另一部分用the other 表达。 故选C
