Question

1. a sentence must express a complete thought and include a

pronoun.
subject and a predicate.
subject and an adjective.
noun, an adverb and a verb.

Explanation:

To determine the correct option, we recall the definition of a sentence. A sentence must have a subject (what or who the sentence is about) and a predicate (what the subject does or is, which includes the verb and other details). A pronoun is not required (e.g., "The sun rises" has no pronoun). A subject and an adjective are insufficient (e.g., "The big" is not a sentence). A noun, adverb, and verb are not necessary (e.g., "I run" has no adverb). So the correct option is the one with "subject and a predicate".

Answer:

B. subject and a predicate.