ответьте на вопросы в утвердительной и отрицательной форме was the text difficult? will be our engineers at the exhibition last week? were your parents at the theatre last night? was it interesting at the party? will you be late for lessons tomorrow? is she impolite? am i wrong? were they at home yesterday?

1) yes, it was / no, it wasn't 
2) yes, they will / no, they will not 
3) yes, they were / no, they were not 
4) yes, it was / no, it wasn't 
5) yes, I will / no, I will not 
6) yes, she is / no, she isn't 
7) yes, I am / no, I'm not 
8) yes, the were / no, they were not