题目内容：
The word "sustain" paragraph 2 could be best replaced by
参考答案：
答案解析：
单选题：The word "sustain" paragraph 2 could be best replaced by
- 题目分类：综合类
- 题目类型：单选题
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根据下列文章,请回答题。请选择（1）处最佳答案。
根据下列文章,请回答题。请选择（1）处最佳答案。
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