根据对话内容,在每小题的空白处填入适当的话语,是对话意思完整
Bob Green：________________________?
Astronaut：Six years ago,I joined NASA.
Bob Green：________________________?
Astronaut：I have flown in a spacecraft three times
Bob Green：________________________?
Astronaut：Yes,I enjoyed the journey to space very much
It was exciting
Bob Green：Have you worked on the space station?
Astronaut：________________________.I‘ve been there twice.
Bob Green：________________________?
Astronaut:Yes,I have.The Earth looked very beautiful!
Bob Green:How wonderful I'm looking forward to seeing that ,too.In the future,I'd
like to be an astronaut.