--- Everyone says you are a good student. You never fall asleep in class?

---        .

A．Yes, sometimes

B．Yes, I did

C．Yes, never

D．No, I didn’t

作业场所实行定置管理，工具、物料摆放整齐，标识清楚，做到“三清”，下列除哪项外均属于三清（）。（）

A、工作台

B、配件

C、工具清洁

D、衣物清洁