как вы понимаете смысл выражений "муки совести", "угрызения совести", " больная совесть", "нечистая совесть", спокойная совесть"?

Помогите, пожалуйста)

Task 1. Fill the gaps in the text with the best variant (7 points).
Hannah and Mark were 1… . They were ten years old and
they were in the same class at their 2… .
A few weeks ago, their English teacher said to 3…, ‘I haven’t
given you any homework for two weeks. Now this week, write a
composition about “Our cat”, and give it to me next Monday.
Have you all got a 4… at home?’
‘Yes, Miss Jones,’ all of them answered.
All the 5… did the composition, and they gave it to the
teacher on 6… . The teacher read all the compositions and then
she gave them back to the pupils on Tuesday.
‘Hannah’, she said, ‘your composition is the same as your
brother’s.’
‘Yes,’ answered Hannah quickly. ‘Because it’s the 7... cat!’

1 A brothers, B twins, C cousins
2 A school, B shop, C prison
3 A the parents, B the workers, C the children
4 A dog, B aardvark, C cat
5 A boys, B people, C pupils
6 A Monday, B Tuesday, C Sunday
7 A some, B same, C seem