Multiple choice

The air we breathe consists ____ nitrogen, oxygen, carbon dioxide, and several other gases.

  1. from

  2. of

  3. for

  4. by

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The verb "consist" is followed by the preposition "of" when describing the components or ingredients that make up a whole. Other prepositions like "from", "for", or "by" do not form a grammatically correct phrase with "consist" in this context.