Nice ______ to you talking to talk

Nice ______ to you talking to talk nice talking to you, Nice talking to you. Nice talking to you.中,talk为什么加ing? 为什么是It's nice talking to you.而不是It's nice to talk to you. nice talking to you 和nice talk to you有什么区别? nice () to you.A:talking B:talk C:to talk D:talks nice to talk to you nice talking to you.是什么意思 Nice ______(talk)to you.See you next time. It was nice talking to you和It is nice talking to you用哪个? Nice ____ (talk) to you 如何写!