Question

............ is a good exercise.

• A. Walk
• B. Walked
• C. Walking
• D. Having walked

Hint:

Use gerunds ({verb+ing}) to name activities.

Answer 1

The Correct Option is C

Step 1: Identify the subject.
The subject of the sentence is an activity. For activities, we use a gerund (-ing form).
Step 2: Apply.
"Walking is a good exercise" is the correct and natural expression.