There must be some way to put my mind to good use.
总会有办法让我发挥才智。
She showed me her gratitude by inviting me to dinner.
她邀请我吃饭以表示她的感激。
On turning eagerly to the text, one learns that the lady was a typist who found the sound of office typewriters worried her more and more until eventually she had to go into a mental hospital.