他上楼去独自读信。

He went upstairs to read the letter in ___solitude.

你会找到真正的独处和一个认真思考人生大问题的地方。

You'll find true ___solitude and a place for serious contemplation of life's big questions.

她珍视清晨的独处时光来进行创作工作。

She values the ___solitude of early mornings for her creative work.