Q2. The answer should be 'that'.
The house that I live in is far from my work.
You cannot use 'in which', because we already have the word 'in' in the sentence following 'live'. It's possible to sat 'The house in which I live is far from my work', but not 'The house in which I live in is far from my work.'
Q7. This is not a very well constructed question, as it has several possible answers. Your answer is correct and, as Susanne says, A is also possible. However, the best answer is probably B. As Natalia points out, the use of 'always' with a present continuous indicates a repeated habit that you find annoying or irritating. This fits the context perfectly. Well done, Natalia.
Q8. The answer should be 'the wealthy'. This is a special use of [definite article] + [adjective] to make a collective noun referring to a whole class of people. Other common examples are 'the young' 'the old' and 'the poor'.
Well done. You seem to have a very good grasp of English grammar.