(~s)
A ~ is a book to help you learn a particular subject which has questions in it with spaces for the answers.
N-COUNT
(~s)
A ~ is a book to help you learn a particular subject which has questions in it with spaces for the answers.
N-COUNT
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012