题目

语法填空I was walking into my first school in America. On the firstday, I went to my second period after I (miss) my first. With anxietyand fear, I reached for the door knob(门把手), opening itslowly. Everyone's eyes (be) on me as I entered the room. Without (pay) attention to them, I went straight to the teacher and asked ifthis was the right class. With a soft voice he answered, Yes. Hisvoice comforted me little. I chose the seat close to the door. I spentthe rest of the class taking notes from the image (produce) by theoverhead projector(放映机).Since it was my first day, I was不等式组的解集是    ．