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① window A.
② door B.
③ chair C.
④ blackboard D.
①同学们,早上好。 A. Stand up.
②指向门。 B. Point to the window.
③起立。 C. Sit down.
④指向窗户。 D. Point to the door.
⑤坐下。 E. Good morning, boys and girls.
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