Multiple choice

Directions: Substitute the following phrases with one word from the given options.

A useless part

  1. Fog

  2. Soak

  3. Wheel

  4. Cog

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

A cog is a tooth on a wheel, but metaphorically refers to someone or something that serves no useful purpose. The phrase 'a cog in the machine' often implies insignificance. Among the options, only 'cog' can mean a useless or insignificant part.