Answer :
Parallel structure is referred to as a situation in English grammar where a grammatical form or structure is repeated within a sentence. Each grammatical form, being similar in structure, thus creates a parallel structure. Parallel structure helps in establishing balance and flow in a sentence. The correct answer with parallel structure is :
The concert begins at nine; it ends at midnight.
Answer: B is correct, "During the four days that we were on vacation, my dog refused to eat."
Explanation:
The words vacation and out of town are repetitive, and therefore unnecessary. The words repeated and over and over again are the same case. When you remove both of those, sentence B best portrays the most concise sentence.
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