Well I suppose she means that she can't keep her thoughts straight but I think I might need to read the story to understand it completely.
Dr. Manette uses shoemaking to calm his troubled mind after learning Darnay's true identity
Cora and Mellie's hands are grasped strongly together.
Answer:
Positive – 'No other metal is as precious as gold'. Superlative – 'Gold is the most precious of all metals'. Comparative – 'Gold is more precious than all the other metals'
Explanation: