The answer choice that is a gerund or gerund phrase used to combine these two short sentences will be D. To keep fit, Cassie is always walking.
<h3>What is a gerund?</h3>
A gerund phrase is a sentence made up of the gerund and any objects or modifiers that go with it. A gerund is a noun created by adding ing to a verb root (a present participle).
A complete gerund phrase can serve as a subject, an object, or a predicate nominative in a sentence much like a noun. Gerunds can appear by themselves or as part of a sentence with additional words.
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