题目内容
Look! The students _____ the classroom.
| A．clean | B．are cleaning |
| C．are clean | D．cleaning |
B
解析试题分析：句意：看，学生们在打扫教室。根据句中提示词look可知此句时态应是现在进行时态，其基本结构是be+动词ing，所以选B。
考点：考查动词时态
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