哪些情况出现，即发生抵押权终止的效力（）A、主债权消灭 B、债权人死亡 C、抵押物灭

A:  小题1: Mike?
B: I’m reading a magazine about UFO.
A: Really?  小题2:
B: Well.  小题3: The universe(宇宙) is so big and three millions of stars in it. I think there must be some kinds of living creatures(生物) in the outer space. They may be clever than us.  小题4: Have you heard of the reports about the UFOs which flew over Beijing, Wuhan and Hangzhou recently(最近)？
A: Oh, yes. And I’ve also read some other reports about the UFOs.
B:  小题5:
A: Well, I can’t really agree with you.

A. What do you think of UFOs? B. What are you reading? C. They are trying to visit us. D. Do you believe there are real UFOs? E. Some of UFO stories may be true.