Fill in the blank with the correct preposition.
After having coffee, she settled herself __________her arm chair

into

The correct preposition to fill in the blank is into. The preposition into is used to indicate movement or placement inside something. In this case, after having coffee, she settled herself into her armchair, which means that she sat down in her armchair.

The other options are incorrect.

• Over is used to indicate something that is being discussed or talked about.
• To is used to indicate direction or purpose.
• On is used to indicate location or position.