很高兴认识大家用英文说怎么说？

I'm glad to have met you/everyone 我很高兴同你/大家认识.
It's really a pleasure to meet you/everyone
It's really an honor for me to meet you/everyone我很荣幸能认识你/大家
I'm really happy that i can meet you我很高兴认识你们

I am very glad to know everyone!

Very glad to meet everyone of you!

口语的：glad to see you. nice to meet you

I am very glad to meet all of you!