It's nice ---(talk) to you

It's nice ---(talk) to you 为什么是It's nice talking to you.而不是It's nice to talk to you. 了it's nice to put a face on you when we talk, It is nice to talk to you .感叹句 It is nice to talk to you this morning是什么意思 nice to talk to you It's nice to meet you It's nice of you to help It's nice to meet you finally It's nice of you to say It's nice to meet you again It’s nice to meet you中的nice是什么意思