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Review: Shinkansen
Explanation
Creating a filter: the sentence as written has the phrase
"the required time of traveling," which sounds unnatural. We examine how that
phrase is handled in the other answer choices.
Applying the filter: choices (B) and (C) make the
situation even worse by including the gerund "being" unnecessarily. Choice (E)
has a strange word order, and it also creates a grammatical error by separating
subject and verb by a single comma. The correct answer is (D).
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