几道英语的同义句转换

1.Nick is my friend./My friend is Nick.
2.Why not bring your sister here?
3.Nice to meet you!
4.Mike is very happy to play.
第4句不知道是否正确.对不起额.不知道怎么讲理由

1.Nick is one of my friends./ I'm mike's friend.
2.Why not to take your sister here?
3.It's pleasure to meet you.
4.Mike have a goog day.