From Activity 3, the original text incorrectly uses 'there's impossible'. 'It' is used to describe a general situation or state, such as something being 'impossible'. Therefore, 'it's impossible' is correct.
Class 6 › English Grammar and Composition › Chapter 7: Introductory 'There' & 'It' › Topic: Understanding the use of 'there' for existence, events, and quantities
Aligned to the NCTB national curriculum.