题目

一William has asked me to lend him five pounds．Should I do him the favor and lend it to him? —Certainly，otherwise he________to borrow it from me． A．would try    B．should have tried    C．would have tried     D．had tried 答案：A如图所示为某同学设计的教室中六盏灯的电路图，由两个开关控制，每个开关控制三盏灯，每盏灯的额定电压都是220V．则能满足要求的是（　　）A．B．C．D．