Multiple choice

Directions: Choose the correct option to fill up the blank.

As __________ as a rock.

  1. solid

  2. hard

  3. hollow

  4. dense
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The idiom 'as solid as a rock' is a standard expression used to describe something firm, stable, or reliable. While 'hard' is a property of a rock, 'solid' is the idiomatic choice here.

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