答案:A
解析:
The error in this sentence occurs at (A), where there is awkward and wordy phrasing. The awkward "Long been" should simply be "Long" ("Long isolated...").
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答案:A
解析:
The error in this sentence occurs at (A), where there is awkward and wordy phrasing. The awkward "Long been" should simply be "Long" ("Long isolated...").