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