``It's not your day, is it, dear?'' ``No, but they 've got to be done, and Shirley's making the tea.'' Ianthe had not told her mother that she sometimes had to dust the books in the library.

Can we draw the following conclusion (choose your answer)?
Ianthe sometimes had to dust the books in the library

Options:
1). Yes;
2). No;
3). It's impossible to say;
1).