Lingling likes _____ a book.       

空气中体积分数约占78%的气体是（ ）

下列各项中，划线的字读音完全正确的一项是（    ）

家用冰箱内的温度高低由温控开关S_温控制，当冰箱内温度高于设定值时，S_温将自动闭合，压缩机 开始工作；当冰箱门打开时，开关S_门闭合，照明灯发光．下列电路符合要求的是（  ）

      On weekdays, David gets up at 6:30.He has breakfast at seven and then he goes to school by bus. He gets there at 7:15. He doesn't like to be late. Classes begin at 8:00. He has lunch at twelve at school. He goes home at 5:30 in the afternoon. On weekends, he gets up at about 8:00 and makes breakfast for his family. His parents like him very much.