汛期后应及时总结，对存在的隐患进行整改，总结情况应及时上报（）。
参考答案：主管单位
More than twenty years____________since he came to teach in this school, and every student and every parent_____him.
A．have passed,like
B．has passed,likes
C．have passed,likes
D．has passed,like
修习 * * 的前提条件是什么？
