Поставьте в форме единственного числа: Women, feet, children, analyses, data, news, theses, means, series, glasses, leaves,

Women - a woman, feet - a foot, children - a child, analyses - an analysis, data - a datum, news - news /a piece of news, theses - a thesis, means - means, series / a series, glasses - a glass, leaves - a leaf, knives - a knife, sheep - a sheep, shorts - shorts, plays - a play, books - a book.