Гроза, 9. Students book. Unit 1. Lesson 3-4. Exercise 1b

I am is more formal because contracted forms usually characterize spoken language. Other examples of contracted forms in the text are: I’ve, I wonldn’t, ’cause, I’ll, I haven

The into in Text A may be addressed to teenage pen friends or teenage readers. The into in Text B may be addressed to grown-ups.

I love partying is less formal than Another passion of mine is animals.

Witty and chatty, pretty bossy are too informal for Text B.