Multiple choice

Directions: Fill in the blank with appropriate word from the given options.

It is gravity _______ objects towards the Earth.

  1. pulling

  2. that pulls

  3. to pull

  4. what pulls

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

This is a cleft sentence structure used for emphasis: 'It is [subject] that [verb] [object]'. 'That pulls' correctly completes this construction.