完成对话。在对话空格中填上适当的单词，使对话完整正确；一空一词（含缩写词）。（共10小题，每小题1分；计10分）
A: Tommy, do you know that a plane of Malaysia Airlines was missing?
B: Yes. I heard about the news after the first class. At that time, I was taking a      with my friends outside the classroom.
A: What bad news it was! I was really       when I heard the news.
B: The plane was        from Kuala Lumpur to Beijing, with 239 passengers on it.
A: Right, but the      of Chinese on the plane is 154. Do you think they       asleep when the accident happened?
B: Maybe. So far,       knows what happened to the plane and the passengers.
A: The plane has been out of contact for a      of days. People all over the world feel both sad and worried.
B:       do I. I watch news about it on CCTV every day.
A: It is reported that 26 countries    the team to find the plane.
B: I hope people can find the plane as soon as     and all the people are safe.
A: I hope so. They must be able to come back some day.