Why not open the window? It’s too          in the room.

A．cold             B．hot              C．dirty             D．clean

Remember not to          your clothes dirty.

A. get          B. getting            C. wash          D. washing

A. Could you don't wear　　  

B. Could you not wearing

C. Would you mind not wear

D. Would you mind not wearing

The desk is not dirty. You    clean it.

  A. mustn’t    B. shouldn’t    C. needn’t D. can’t