我买了一个新的笔记本用来记录课堂笔记。

I bought a new ___notebook to take class notes.

她更喜欢使用笔记本，因为携带方便。

She prefers using a ___notebook because it's easier to carry around.

她每天都会在笔记本上记录所有的收入和支出。

She records all income and expenses in her ___notebooks every day.