It's nice to see you on new year's day.

　　很高興在新年之際看到大家。

　　Nice to see you after a long time.

　　很高興看到你后，很長一段時間。

　　Good morning, nice to see you again, too.

　　早上好，又見到你了真高興。

　　Nice to see you getting some use out of that thing.

　　真高興你能用那東西幫我忙。

　　So nice to see you, what are you doing here?

　　見到你很高興啊，你在這兒干嘛呢？