it's very nice () the girl to help the old

It's very nice! ( )oh,it's very nice It's very nice ( )you. It's very nice.It's yellow. It's very nice是什么意义 It,s very nice of you,中文, It's very nice of you It's very nice ___you to write____me What______this one?------------It;s very nice. It’s very nice of you to help me find th e key A.of B.for C.to D.on选哪一个,请赐教! It must very nice it looks very nice. I want the _____ .It's very nice. I want the _____ .It's very nice. it's very nice of you同义句 It's very nice of you 的中文 英语 it's very nice of you的回答 It's very nice of you 改为同义句