Multiple choice

Directions: Select the correct sentence.

  1. The road was blocked with a glacier.

  2. The road was blocked off a glacier.

  3. The road was blocked by the glacier.

  4. The road was blocked to the glacier.

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

In the passive voice, the agent of the action is introduced by the preposition by. Therefore, the road was blocked by the glacier is the correct sentence.