Упражнение 146 на вопросы с to be в Present Simple

Поставьте глагол 'to be' в Present Simple, в вопросительной или в утвердительной форме.

A: Hi, how you?

B: I fine, thank you!

A: How your wife?

B: She fine, too.

A: And how the children?

B: They on summer holidays in Greece.

A: I sure they are having a lot of fun there. It great!

B: We happy for them, too. By the way, you free next Saturday? 

A: Yes, I am! 

B: Wonderful, let's have a small home party!