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《 牛津英語 》 Period 2 Be helpful in the classroom In the classroom What can we do in the classroom? open open the door open the window close the window close the door close look at look at the blackboard write draw I can________ on the blackboard. What can you do on the blackboard? clean M for mouth , N for nose . Look at your mouth and your nose. I can clean. I can clean. I can clean the blackb