This morning I went to the classroom at seven o’clock because I was on duty today. Of course I was the first one. I was cleaning the blackboard when Li Ming came into the classroom. I asked her, “Why do you come here so early?” She answered with a smile, “I know you are on duty today. Let me help you.” I was very happy and said, “Oh, thank you.” We began to work together. When the teacher arrived, we had already done a good job, and the classroom was clean and tidy. The teacher praised me.
1．Li Ming is the first one today. （_____）
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