Подбор синонимов:
back3, check2, find1, nothing1, tomorrow1, question1, could1, date1, books1, checked1, library1, among1, old1, but1- check back
а искать среди старых изданий We checked back in the library among the old books, but could find nothing of this date. б увидеться с кем-л. еще раз I'll check back tomorrow about that question.