请你根据某学校的一个广播通知，填写下面的海报。

　　May I have your attention, please?I have an announcement to make．

　　Since the A/H1Nl flu is around us, we should pay great attention to our health and get some knowledge about the terrible disease．Our school has invited Doctor Li to give us a talk about how to prevent(预防)the flu．It will start at 4∶00 on Friday aftemoon in our school lecture hall．Students in Grade Seven are required to attend the talk．Please be there on time．

　　That’s all．Thank you．