I guess the whole paper has to be rewritten; only the first few paragraphs may be ____. ( 章节：6 难度：3)_做题室

单项选择题I guess the whole paper has to be rewritten; only the first few paragraphs may be ____. ( 章节：6 难度：3): A、sustained; B、contained; C、maintained; D、retained

正确答案：D
答案解析：
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