How to say the welcome language of class group?

Welcome new teachers to join the class group as follows:

1. Welcome, our new head teacher!

2. Please warmly welcome our new head teacher!

3. Hello, Miss Liu. I'll trouble Miss Liu in the future.

4、Welcome，our new class adviser!

5. Welcome, our new teacher has joined the group to guide the work. Please give us more advice in the years to come.

6. Everyone warmly welcomes our new teacher to join the group. Where is the applause? Roses are on.

7. Hello, Teacher Liu. Let Teacher Liu bother in the future and join the group to help us with our study.

8. Hello, dear teacher. Welcome to join the group for participation and guidance.

9. Students, we welcome the teacher into the group with warm cheers.