Question

какое из указанных слов употребляется только во множественном числе:валенки, сливки, вещи

Answer 1

Сливки.
Валенки-валенок
Вещи-вещь

Answer 2

Сливки
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Answer 3

Words that are used only in the plural form

Out of the words mentioned, the word "валенки" is the one that is used only in the plural form. "Валенки" refers to traditional Russian felt boots that are typically worn in pairs. It is not used in the singular form.

Here is an example sentence using "валенки" in the plural form: "Я надел валенки, чтобы не замерзнуть ноги." (I put on valenki to keep my feet from freezing).

On the other hand, both "сливки" (cream) and "вещи" (things) can be used in both singular and plural forms. For example, you can say "одна сливка" (one cream) or "много сливок" (many creams), and "одна вещь" (one thing) or "много вещей" (many things).

So, the word "валенки" is the only one among the options that is used exclusively in the plural form.

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