根据对话内容，将方框内符合对话情境的序号写在对话中的空白处。（共5小题，计5分）
Yu Bing：Hi，Mark!Have you watched the TV news this morning?
Mark：N0．
Yu Bing：Flight(航班)MH370 from Malaysia(马来西亚) to China disappeared last night．
Mark：How many passengers are there?
Yu Bing： Many countries are now searching for MH370，and yet have no idea what happened to it
Mark：
Yu Bing：We are looking forward to finding the missing flight earlier．
Mark：

A．What’s going on? B． Don’t worry． C  It’s hard to believe! D．I hope so． E．I'm sorry to hear that． F．There are 239 people on board． G．It doesn’t matter．