根据对话,填合适的词

题目

根据对话,填合适的词
A:Hello!
B:Nice to meet you.____ is it going with you?
A:Fantastic!I came back from ____ three days ago.
B:Beijing?It's ____ of my favorite cities.
A:I like it very much.It's ____ an interesting city.
B:____ did you go there?Studying?
A:No,I just went there ____ vacation.
B:What ____ you do there?
A:Well,I ____ some places,such as the Great Wall,the Palace Museum,and Tian'an Men Square.
B:Wow!They're all ____ of interest in Beijing.I think it must be a great ____.
A:You are right.
不会回答的就不要在这裏说话

答案

不明白什么意思?