题目

    It was the beginning of a new term. As a(n)   41   teacher in that school, I didn’t know any of the students. A little girl was   42   at the gate of the classroom. She looked very   43   .     I walked up to her and asked   44   she stood there. But she said   45 . Instead, a boy shouted, “She is from Grade Four, the   46   student in her grade.” I looked at the little girl, who didn’t seem to be the smart kind. I   47   why her teacher asked her to stay in Grade Three. I took her hand and   48  her into the classroom.     “Sit h 下列反应过程中，同时有离子键、极性共价键和非极性共价键的断裂和形成的反应是 A．NH4ClNH3↑＋HCl↑ B．NH3＋CO2＋H2O===NH4HCO3 C．2NaOH＋Cl2===NaCl＋NaClO＋H2O D．2Na2O2＋2CO2===2Na2CO3＋O2