阅读理解。根据上面对话内容判断正T误F。 Bill:  What are you reading? Mike:  A book about UFO. Bill:  Really? Are there real UFOs in our life? Mike:  Well, some of the UFO stories may be true. The universe is so big and there are millions of stars in it. Perhaps there are living things in outer space. They may be cleverer than us and they are trying to visit us. Have you read the report about UFOs that flew over Beijing, Wuhan, and Hangzhou? Bill:  Oh, yes. And I've also read some other reports about the UFOs. Mike:  What do you think of UFOs. Bill:  It's hard to say. I am not sure. (     )1. Mike is reading a newspaper about UFOs. (     )2. Mike thinks there are real UFOs. (     )3. Some reports say the UFOs flew over Beijing. (     )4. Bill didn't read reports about UFOs. (     )5.  Bill knows a lot about UFOs.