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Ответы:

Просто пишешь:

I am ..

My friends are ..

Our head teacher is ..

We are ..

A group of students is ..

после going to и выбираешь любое по смыслу, догадаться легко.



I am going to write an invitation letter

Our Head Teacher is going to miss lessons at school

Mr Wooding is going visit Gread Britain

We are going to thank them for the invitation 

A group of students are going to  arrange a school party