Yg di buletin doang tolong please

1. I don't think we are going to have a native speaker next week.

2. Are you sure about us having a native speaker next week?

3. Pardon? / Can you please repeat what you said?

slanjutnya yg b: Are you sure that next Wednesday is Satrio's birthday party?

A) 1. I'm not sure about that, I don't think I can
2. Are you sure about the English native speaker next week?
4. Can you repeat what you just said / What did you just said?

b) 2. Are you sure Satria's birthday party is next Wednesday?