题目内容：
What does the underlined word“maitain”in last paragraph mean？
参考答案：
答案解析：
单选题：What does the underlined word“maitain”in last paragraph mean
- 题目分类：英语
- 题目类型：单选题
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[A] If [B] While [C] Hence[D] Because
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请在（55）处填上最佳答案。
请在（55）处填上最佳答案。
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